Ladies in panel carry out supporter with sign (14)

I believe the answer is:

committeewomen

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'ladies in panel' is the definition.
The definition suggests a plural noun which matches the answer.

'carry out supporter with sign' is the wordplay.
'carry out' becomes 'commit' (I've seen this before).
'supporter' becomes 'tee' (a golf tee acts as a support).
'with sign' becomes 'women' (I can't justify this - if you can you should believe this answer much more).
'commit'+'tee'+'women'='COMMITTEEWOMEN'

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I've seen this clue in The Times.

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