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'm not certain of 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" .)