Crossword Genius

My pence will make pound (4)

Ross

I believe the answer is:

coop

'pound' is the definition.
(I've seen this before)

'my pence' is the wordplay.
'my' becomes 'coo' (both are expressions of surprise).
'pence' becomes 'p'.
'coo'+'p'='COOP'

'will make' is the link.

(Other definitions for coop that I've seen before include "Store" , "Birdcage" , "Pen" , "Cage for poultry" , "pound" .)

I've seen this clue in The Telegraph.
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