A close arrangement for comfort (6)
I believe the answer is:
solace
'for comfort' is the definition.
(solace is a kind of comfort)
'a close arrangement' is the wordplay.
'arrangement' indicates anagramming the letters.
'a'+'close'='aclose'
'aclose' with letters rearranged gives 'SOLACE'.
(Other definitions for solace that I've seen before include "Comfort and reassurance" , "Kind of comfort - a close thing" , "Comfort in time of disappointment or sorrow" , "Comfort at a time of sadness" , "Relief in affliction" .)