Fixes while the salesman looks on (7)
I believe the answer is:
repairs
'fixes while' is the definition.
'repairs' can be an answer for 'fixes' ('repair' can be a synonym of 'fix'). I'm not sure about the 'while' bit.
'salesman looks on' is the wordplay.
'salesman' becomes 'rep' (sales representative).
'looks' becomes 'airs' (I've seen this in other clues).
'on' means one lot of letters go next to another.
'rep'+'airs'='REPAIRS'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for repairs that I've seen before include "Doctors" , "Restores" , "Withdraws" , "makes good" , "Mends, fixes" .)