Crossword clues for Useful hints. 4 lettersAnswerClueTIPSUseful hints.TIPUseful hintHARRYPOTTERFictional wizard, and a hint to who would use the ends of 17-, 25-, 36- and 50-AcrossBUZZWORDSTrendy, much-used lingo ... or a hint to the starts of 16-, 23-, 35- and 48-AcrossPRINTMAKINGCraft using inked blocks, and a hint to the circled wordsSNOWJOBSPersuasive efforts using insincere flattery ... and a hint to the last words of the answers to starred cluesMAKEITLASTUse this sparingly ... or a hint to this puzzle's themeAYEAYETONEVoice quality used when agreeing with an admiral? (Hint: Consider "two" in Roman numerals)DEARJOHNLETTERSThings used for dumping ... or a literal hint to the answers to the starred clues?ROLEREVERSALPlot device used in "Freaky Friday" ... or a hint to the interior of 20-, 26- or 42-AcrossFACERECOGNITIONTechnology used by smartphones nowadays ... or a hint to the ends of 16-, 24-, 44- and 57-AcrossINSIDEBASEBALLSports metaphor used to describe esoteric knowledge ... with a hint to the circled lettersREDACTEDUsed a black marker on ... or a hint to three chunks of black squares in this puzzleCANDYSTRIPEPattern once used for hospital volunteer uniforms, with a hint to this puzzle's themeTBIRDClassic car ... and a hint to the hidden image you can draw using 21 identical squares in this gridMIXEDMEDIAArtwork using both paint and collage, e.g. ... and a hint to this puzzle's circled lettersSTIRFRIESUses a wok, or, read as a direction, a hint to the ends of 17-, 28- and 44-AcrossLENDINGOUTAllowing use of, as a library does ... or, in three parts, a hint to four puzzle answersWHATSTHEBIGIDEAHold on one gosh darn minute!” nyt 1995 WHEAT Futures market commodity nyt 1995 WHEAT Plains harvest nyt 1995 WHEEL Big-time operator nyt 1995 WHEEL Potter's aid nyt 1995 WHELK Marine snail nyt 1995 WHELK Spiral-shelled snail nyt 1995 WHELPS Has a litter nyt 1995 WHEN Timely question nyt 1995 WHENCE By reason of which nyt 1995 WHENTHECATSAWAY With 36 Across, shirker's comment nyt 1995 WHET Stimulate nyt 1995 WHETS Sharpens nyt 1995 WHETS Uses a strop nyt 1995 WHEW Exclamation of relief nyt 1995 WHIFF Hint of fragrance nyt 1995 WHIG Fillmore, politically nyt 1995 WHIG Tyler or Taylor, e.g. nyt 1995 WHILST At the same time nyt 1995 WHIM Fancy nyt 1995 WHIM Impulse nyt 1995 WHINE Complain nyt 1995 WHIPPOORWILL Nocturnal bird with an onomatopoeic name nyt 1995 WHIRL Dizzying itinerary nyt 1995 WHIRLY Violent wind carrying snow nyt 1995 WHIRLYBIRD Spinning Larry? nyt 1995 WHISKYREBELLION Pennsylvania insurrection, 1794 nyt 1995 WHIST Hoyle subject nyt 1995 WHIST Lamb essay Mrs. Battle's Opinions on _____"