Blame your head for needing this, perhaps (7)
I believe the answer is:
therapy
'needing this perhaps' is the definition.
The definition suggests a singular noun which matches the answer.
'blame your head' is the wordplay.
'blame' becomes 'the rap' (someone blamed for something 'takes the rap').
'head' says to take the initial letters.
The first letter of 'your' is 'y'.
'therap'+'y'='THERAPY'
'for' is the link.
(Other definitions for therapy that I've seen before include "Curative treatment" , "Medical treatment" , "Healing treatment" , "healing process" , "Treatment designed to cure illness or disability" .)