Sloppy prison meal getting cold (10)
I believe the answer is:
impersonal
'cold' is the definition.
('impersonal' can be similar in meaning to 'cold')
'sloppy prison meal getting' is the wordplay.
'sloppy' indicates an anagram.
'getting' says to put letters next to each other.
'prison'+'meal'='prisonmeal'
'prisonmeal' anagrammed gives 'IMPERSONAL'.
(Other definitions for impersonal that I've seen before include "Aloof" , "Ignoring one's own feelings" , "Cold" , "Objective; disinterested" , "Cool" .)