Strange offence; forced labour camp not good answer ultimately (8)
I believe the answer is:
singular
'strange' is the definition.
(similar in meaning)
'offence forced labour camp not good answer ultimately' is the wordplay.
I cannot quite understand how this works, but
'offence' could be 'sin' (a sin is an offence or transgression) and 'sin' is present in the answer.
'labour' could be 'l' (political abbreviation) and 'l' is present in the answer.
'good' could be 'g' (abbreviation) and 'g' is found in the answer.
'answer' could be 'a' (abbreviation eg in Q and A) and 'a' is present in the answer.
The remaining letters 'ur' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for singular that I've seen before include "Extraordinary - just one (8)" , "As sheep may be, but not cattle or horses" , "Unusual, maybe unique" , "Extraordinary, with reference to one" , "Unusual - not plural" .)