Cold comfort in end (5)
I believe the answer is:
cease
'end' is the definition.
(I know that end can be written as cease)
'cold comfort' is the wordplay.
'cold' becomes 'c' (eg on taps).
'comfort' becomes 'ease' (synonyms).
'c'+'ease'='CEASE'
'in' acts as a link.
(Other definitions for cease that I've seen before include "Desist" , "Culminate" , "Stop, terminate" , "Stop, give over" , "Stop, finish" .)