Blow struck for an individual right (4)
I believe the answer is:
oner
'blow struck for' is the definition.
'oner' can be an answer for 'blow' (I have seen 'Heavy blow ' mean 'oner' so perhaps 'blow' could also mean 'oner'). I am not sure about the 'struck for' bit.
'individual right' is the wordplay.
'individual' becomes 'one' (an individual is one person).
'right' becomes 'r' (common abbreviation).
'one'+'r'='ONER'
'an' is the link.
Can you help me to learn more?
(Other definitions for oner that I've seen before include "something unique" , "Remarkable thing" , "Big lie; unique thing" , "expert" , "A quid" .)