A salesman of fireplaces? (3)

I believe the answer is:

rep

'a salesman' is the definition.
(sales representative)

'of fireplaces?' is the wordplay.
'of' indicates a hidden word.
'REP' is hidden within 'fireplaces'.

(Other definitions for rep that I've seen before include "Sort of theatre" , "Material for curtains" , "Representative; fabric" , "Theatre; fabric; salesman" , "Salesperson" .)

I've seen this clue in the Evening Standard.

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