Valuable things like complete collections (6)

I believe the answer is:

assets

'valuable things' is the definition.
(I've seen this in another clue)

'like complete collections' is the wordplay.
'like' becomes 'as'.
'complete collections' becomes 'sets' (I've seen this in another clue).
'as'+'sets'='ASSETS'

(Other definitions for assets that I've seen before include "Valuable resources" , "capital" , "Personal wealth" , "One's valuables" , "Resources or holdings ( 6)" .)

I've seen this clue in The Globe and Mail.

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