Bent copper facing end of his employment (11)
I believe the answer is:
disposition
'bent' is the definition.
(I know that bent can be written as disposition)
'copper facing end of his employment' is the wordplay.
'copper' becomes 'DI' (detective inspector, type of copper).
'facing' means one lot of letters go next to another.
'end of' indicates one should take the final letters.
'employment' becomes 'position' (position is a kind of employment).
The last letter of 'his' is 's'.
'di'+'s'+'position'='DISPOSITION'
(Other definitions for disposition that I've seen before include "Inclination, tendency" , "Temperament" , "Bent" , "Way in which something is placed" .)