Woman's support round butt! (6)

I believe the answer is:

brenda

'woman's' is the definition.

'support round butt' is the wordplay.
'support' becomes 'bra' (a support for the breasts).
'round' indicates putting letters inside.
'butt' becomes 'end' (I've seen this before).
'bra' enclosing 'end' is 'BRENDA'.

(Another definition for brenda that I've seen is " - - Blethyn, actress".)

I've seen this clue in The Telegraph.

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