Ready-made article put in ice to freeze (3-3-3)
I believe the answer is:
off-the-peg
'ready-made' is the definition.
(I've seen this before)
'article put in ice to freeze' is the wordplay.
'article' becomes 'the' (the definite article in English).
'put in' is an insertion indicator.
'ice' becomes 'off' (both can informally mean to kill someone).
'to freeze' becomes 'peg' (eg pegging or freezing a price at a certain amount).
'off'+'peg'='offpeg'
'the' placed within 'offpeg' is 'OFF-THE-PEG'.
(Other definitions for off-the-peg that I've seen before include "(Of clothes) ready-to-wear" , "Of clothes, bought ready to wear" , "Ready-made, for immediate purchase" , "Not made-to-measure" , "Of clothes, not made to measure, on the rack" .)