Pressure put on husband with single call (5)
I believe the answer is:
phone
'call' is the definition.
('phone call' can be a synonym of 'call')
'pressure put on husband with single' is the wordplay.
'pressure' becomes 'p' (abbreviation).
'put on' says to put letters next to each other.
'husband' becomes 'h'.
'with' means one lot of letters go next to another.
'single' becomes 'one' (I've seen this before).
'p'+'h'+'one'='PHONE'
(Other definitions for phone that I've seen before include "Covert monitoring of electronic exchanges" , "It converts sounds into signals and back again" , "Communications device" , "Make a call" , "Call, ring" .)