Fall for pretty girl clutching short skirt (8)
I believe the answer is:
diminish
'fall' is the definition.
('diminish' can be a synonym of 'fall')
'pretty girl clutching short skirt' is the wordplay.
'pretty girl' becomes 'dish' (I've seen this in other clues).
'clutching' is an insertion indicator.
'short skirt' becomes 'mini' (I've seen this before).
'dish' going around 'mini' is 'DIMINISH'.
'for' is the link.
(Other definitions for diminish that I've seen before include "cut down" , "Diet" , "get shorter" , "make shorter" , "Grow smaller, shrink" .)