Salesman with decorative fabric giving change (7)
I believe the answer is:
replace
'change' is the definition.
(I know that change is a more specific form of the action replace)
'salesman with decorative fabric' is the wordplay.
'salesman' becomes 'rep' (sales representative).
'with' says to put letters next to each other.
'decorative fabric' becomes 'lace' (I've seen this in another clue).
'rep'+'lace'='REPLACE'
'giving' is the link.
(Other definitions for replace that I've seen before include "Put back where you found it" , "Put something back where it belongs" , "succeed" , "Substitute, supplant" , "Substitute, supersede" .)