That woman puts pressure on crush, a guide (8)
I believe the answer is:
shepherd
'a guide' is the definition.
(I've seen this before)
'that woman puts pressure on crush' is the wordplay.
'that woman puts' becomes 'she' (I can't justify this - if you can you should believe this answer much more).
'pressure' becomes 'p' (abbreviation).
'on' is a charade indicator (letters next to each other).
'crush' becomes 'herd' (both can mean a large group).
'she'+'p'+'herd'='SHEPHERD'
(Other definitions for shepherd that I've seen before include "working with a crook?" , "Agricultural worker" , "See 16" , "Pastor" , "Guide, direct" .)