Lush exterior of diaphanous resins (6)

I believe the answer is:

alkyds

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'resins' is the definition.
(alkyd is a kind of resin)

'lush exterior of diaphanous' is the wordplay.
'lush' becomes 'alky' (I can't justify this - if you can you should give a lot more credence to this answer).
'exterior of' suggests removing the centre.
'diaphanous' with its centre taken out is 'ds'.
'alky'+'ds'='ALKYDS'

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I've seen this clue in The Guardian.

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