Coin that's out of shape, somewhat? (4)
I believe the answer is:
peso
'coin' is the definition.
(I have seen 'Mexican coin ' mean 'peso' so perhaps 'coin' could also mean 'peso')
'out of shape somewhat?' is the wordplay.
'out of' indicates the answer is hidden within the clue.
'PESO' is hidden within 'shape somewhat'.
'that's' acts as a link.
(Other definitions for peso that I've seen before include "Unit of Mexican money" , "Mexican dollar" , "ready for Mexican" , "Currency of Mexico" , "Mexican monetary unit" .)