Salesman given more money for repeated performance (7)
I believe the answer is:
reprise
'repeated performance' is the definition.
'salesman given more money' is the wordplay.
'salesman' becomes 'rep' (I've seen this before).
'given' is a charade indicator (letters next to each other).
'more money' becomes 'rise' (I've seen this before).
'rep'+'rise'='REPRISE'
'for' is the link.
(Other definitions for reprise that I've seen before include "annual charge?" , "renewed earlier theme" , "Another performance" , "Musical repetition" , "encore" .)