Husband having brass header sculpted for those selling sewing things (12)

I believe the answer is:

haberdashers

'those selling sewing things' is the definition.
(people who sell sewing materials)

'husband having brass header sculpted' is the wordplay.
'husband' becomes 'h' (abbreviation).
'having' is a charade indicator (letters next to each other).
'sculpted' indicates anagramming the letters.
'brass'+'header'='brassheader'
'brassheader' anagrammed gives 'aberdashers'.
'h'+'aberdashers'='HABERDASHERS'

'for' acts as a link.

I've seen this clue in The Guardian.

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