She parts company with an angler (9)
I believe the answer is:
fisherman
'angler' is the definition.
(thesaurus)
'she parts company with an' is the wordplay.
'parts' indicates putting letters inside (in the sense of cuts or separates).
'company' becomes 'firm' (I've seen this before**).
'with' is a charade indicator (letters next to each other).
'she' inserted within 'firm' is 'fisherm'.
'fisherm'+'an'='FISHERMAN'
(Other definitions for fisherman that I've seen before include "He casts" , "St Peter" , "Male anger" , "networker?" , "Male angler" .)