A woven fabric to suit oneself (2,4)

I believe the answer is:

at will

'to suit oneself' is the definition.
(I've seen this in another clue)

'a woven fabric' is the wordplay.
'woven fabric' becomes 'twill' (I've seen this in another clue).
'a'+'twill'='AT WILL'

(Other definitions for at will that I've seen before include "when one wants" , "Whenever one pleases, say fire rifle" , "take it as I please" , "Whenever you please, as you like" , "When I choose" .)

I've seen this clue in The Guardian and The Daily Express.

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