14a. Forward movement mostly not relying on gills?
LUNGE
...I get it...LUNG + E, but where does the E come from?
8d. Fakeish-sounding soft leather
CHAMOIS
... I get it...CHAM sounds like SHAM, but where does the OIS come from?
22a. Very small wedding buffet
MATCHBOX
12a. This would be the making of one
TWELFTHS
Parses for the above please.