Double portion of stew in a can (4)

I believe the answer is:

twin

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'double' is the definition.
(thesaurus)

'portion of stew in a can' is the wordplay.
'portion of stew' becomes 'w' (I am not sure about this - if you are sure you should believe this answer much more).
'in' indicates putting letters inside.
'a can' becomes 'tin' ('tin' can be a synonym of 'can').
'w' put within 'tin' is 'TWIN'.

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(Other definitions for twin that I've seen before include "Balearic island" , "Castor or Pollux?" , "Link (two towns)" , "eg Pollux or Remus" , "One of Gemini" .)

I've seen this clue in the Evening Standard.

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