FETID (F and diet anagram, nice one)
+++++
Fools show the way using this (6, 5)
IDIOT’S GUIDE
Utopian saint succeeds arrangement between eyes. (8)
IDEALIST (I-deal-I+st)
Clever
+++++
Smith rearranged our land strip.(7)
ISTHMUS (anagram of smith + us)
They told me brawn best served in shell. (6)
MUSSEL (homonym)
Convince mother to see Ava DuVernay film (5)
SELMA (sell ma)
+++++
After Fenrir bit his hand off, he was maimed but became an inspiring symbol. (6)
MARTYR (mar + Tyr)
Rejected by lender I’d developed. (8)
Redlined (anagram lender I’d)
+++++
Hazards in gardens (7)
Hazards in gardens (7)
DANGERS (gardens*)
+++++
Indecent swinger hugs hot composer. (8)
GERSHWIN (swinger+H)
+++++
Loose twine is just right for the chilly season.(6)
WINTER (twine + r)
“Shred a morsel,” I told you a million million times. (8)
TERABYTE ( homophone)
Point relays it evenly (4)
EAST (2nd letters of “relays it”)
Mansion tart crashed Bond’s car. (5, 6)
Interestingly, I came up with an alternative answer (which doesn’t quite fit the given overlap): trillion. It’s a bit of a stretch - relies on ‘shredding’ a guitar for ‘trill’ - but I thought it was interesting.
ASTON MARTIN (anagram of “mansion tart”).
+++++
It’s become commonplace to say these don’t need glasses (9)
NORMALIZE (homophone)
Air to begin: zodiac enters Pisces, halting your rage. (6)
The even letters. 
ZEPHYR (first letters)
Looking for that African critter? Sounds like it’s in the upper shelves. (5)
HYRAX (homophone)
Self evident taxi won’t start before atomic disaster. (9)
AXIOMATIC (axi + atomic)
Ignored coat falling apart at pencil company. (11)
Ticonderoga (ignored coat)
++++
Explosion at a grub stop! (9)