Man taking beer cold (4)
I believe the answer is:
alec
'man' is the definition.
(I've seen this before)
'beer cold' is the wordplay.
'beer' becomes 'ale' (I've seen this before).
'cold' becomes 'c' (eg on taps).
'ale'+'c'='ALEC'
'taking' acts as a link.
(Other definitions for alec that I've seen before include "Smart ..., he thinks he knows everything" , "Smart boy?" , "Sir -- Guinness, actor" , "Boy's name (a smart one?)" , "Smart man?" .)