Bishop with responsibility for extra pay (5)
I believe the answer is:
bonus
'extra pay' is the definition.
(I've seen this in another clue)
'bishop with responsibility' is the wordplay.
'bishop' becomes 'B' (chess abbreviation).
'with' means one lot of letters go next to another.
'responsibility' becomes 'onus' (onus is a duty or responsibility).
'b'+'onus'='BONUS'
'for' is the link.
(Other definitions for bonus that I've seen before include "Extra payment for good work" , "Extra payment - reward" , "Tip" , "Additional payment for work, often on merit" , "commission" .)