Exchange bowl finally after salesman gets hole in one (7)
I believe the answer is:
replace
'exchange' is the definition.
(replacing is a kind of exchanging)
'bowl finally after salesman gets hole in one' is the wordplay.
'finally' suggests the final letters.
'after' is a charade indicator (letters next to each other).
'salesman' becomes 'rep' (I've seen this before).
'gets' means one lot of letters go next to another.
'hole in one' becomes 'ace' (I've seen this before).
The last letter of 'bowl' is 'l'.
'l' put after 'rep' is 'repl'.
'repl'+'ace'='REPLACE'
(Other definitions for replace that I've seen before include "Substitute for (someone)" , "Substitute, supplant" , "Put back where you found it" , "Put something back where it belongs" , "Substitute, supersede" .)