Assistant fish for management? (8)
I believe the answer is:
handling
'for management?' is the definition.
(handling is a kind of management)
'assistant fish' is the wordplay.
'assistant' becomes 'hand' (hand can mean a worker or employee).
'fish' becomes 'ling' (ling is a kind of fish).
'hand'+'ling'='HANDLING'
(Other definitions for handling that I've seen before include "Touching" , "Dealing with or holding" , "Dealing with (may be a charge)" , "giving treatment" , "Managing or feeling" .)