Fit to wear a two-piece? (8)

I believe the answer is:

suitable

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'fit' is the definition.
(similar in meaning)

'wear a two-piece?' is the wordplay.
'wear' becomes 'suit' (suit is a kind of wear).
'a two piece?' becomes 'able' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'suit'+'able'='SUITABLE'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for suitable that I've seen before include "Becoming" , "qualified" , "Convenient" , "Fit" , "Fitting, apt" .)

I've seen this clue in the Evening Standard.

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