Swell job as a model (7)

I believe the answer is:

waxwork

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'a model' is the definition.
(thesaurus)

'swell job' is the wordplay.
'swell' becomes 'wax' (I can't justify this - if you can you should believe this answer much more).
'job' becomes 'work' (synonyms).
'wax'+'work'='WAXWORK'

'as' acts as a link.

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(Other definitions for waxwork that I've seen before include "Image" , "Candle material effigy" , "Figure made from candle material" , "Life-sized representation of a celebrity" , "Still representation of a famous person" .)

I've seen this clue in the Evening Standard.

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