Fries cold joints (5)
I believe the answer is:
chips
'fries' is the definition.
(French fries)
'cold joints' is the wordplay.
'cold' becomes 'C' (eg on taps).
'joints' becomes 'hips' (hip is a kind of joint).
'c'+'hips'='CHIPS'
(Other definitions for chips that I've seen before include "Fried potato strips" , "What one eats" , "French fries" , "Goodbye, Mr -, novel" , "Potato slices, good with fish" .)