Carpet salesman on edge with ... (9)
I believe the answer is:
reprimand
'carpet' is the definition.
(I know that carpet can be written as reprimand)
'salesman on edge with' is the wordplay.
'salesman' becomes 'rep' (sales rep).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'edge' becomes 'rim' (rim is a kind of edge).
'with' becomes 'and'.
'rep'+'rim'+'and'='REPRIMAND'
(Other definitions for reprimand that I've seen before include "Tick off - carpet" , "Official scolding" , "telling off" , "Admonish" , "Formal rebuke" .)