Son to get angry keeping in cupboard? (7)

I believe the answer is:

storage

'keeping in cupboard?' is the definition.

'son to get angry' is the wordplay.
'son' becomes 's'.
'get angry' becomes 'rage'.
's'+'to'+'rage'='STORAGE'

(Other definitions for storage that I've seen before include "Charge for warehousing" , "reservation?" , "What repository provides; so great (anag.)" , "Stowage" , "Longer-term laying up" .)

I've seen this clue in The Telegraph.

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