Officer has little time for bed (3)
I believe the answer is:
cot
'bed' is the definition.
(cot is a kind of bed)
'officer has little time' is the wordplay.
'officer' becomes 'co' (Commanding Officer abbreviation).
'has' says to put letters next to each other.
'little time' becomes 't' (abbreviation for time).
'co'+'t'='COT'
'for' is the link.
(Other definitions for cot that I've seen before include "Small boat to hold a baby" , "Baby's bed" , "Baby bed" , "Small child's bed" , "Function" .)