I should not have said your last puzzle was easy! In some cases, it was solely my fault: I kept trying to include [It has] in an even extraction for 1A, for some reason I thought the cookie was the TAGALOG in 1D, and I definitely kept misreading [replacing] in 5A in exactly the deceptive way you intended. To be clear, all of this was great! 4A, when it fell, was satisfying, 3D is the sort of so-good clue that justifies that whole mechanism, 7A is a wonderful surface. I think I quibble a bit with the indicator for 2D, and I don't know [Head Start] enough to fully grok the surface of 5A—but again, those are me problems; you keep putting out wonderful puzzles.
Thank you! Your feedback is always so great. Yeah I keep forgetting that the "of" Hidden indicator isn't totally kosher — I think I first encountered it a decade ago, and loved it so much that I've been using it liberally ever since. I wonder if a ? might be enough to cover the stretchiness? In any case, glad you got it! (oh and Head Start is massive federal program for early childhood services for low-income families. wasn't sure how well-known it is! I have a lot of teacher friends heh)
5A. def: "Head start". anagram ("replacing") of GLUE, then P ("a modicum of Putty")
7A. def: "many fans of dark material" (as in clothing ). wordplay: GOT ("Game of Thrones") + remove the middle letter ("disheartened") of "HaS"
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1D. def: "tongue". wordplay: delete ("dislodging") the first letter ("bit") of "Nougat" from TAGALONG ("Girl Scout cookie")
2D. def: Legendary producer. wordplay: Hidden Answer ("of") in "taRZAn"
3D. def: "is this where you [the lord] live?" (the ? is also for the grammar of this clue! ). wordplay: Reverse Hidden Answer in "whatS UP MY LOrd" (i.e., those words "hold up" the answer)
6D. def: "stomach". wordplay: reversal ("turning") of TUG ("jerk")