View back of sinister man adjusting flies? (6)
I believe the answer is:
angler
'man adjusting flies?' is the definition.
(as in fly-fishing)
'view back of sinister' is the wordplay.
'view' becomes 'angle' (angle is a kind of view).
'back of' indicates one should take the final letters.
The final letter of 'sinister' is 'r'.
'angle'+'r'='ANGLER'
(Other definitions for angler that I've seen before include "Isaac Walton wrote of the 'Compleat' one" , "Hook and line fisherman" , "Strait; -- of Lochalsh" , "Sportsman" , "One hoping for a catch" .)