Representative from record company's claim about Queen (8)
I believe the answer is:
emissary
'representative' is the definition.
(emissary is a kind of representative)
'record company's claim about queen' is the wordplay.
I cannot really see how this works, but
'about' could be 'a' (abbreviation in Chambers) and 'a' is found within the answer.
'queen' could be 'r' (r is abbreviation regina. e.g. in ER ) and 'r' is located in the answer.
'record company' could be 'emi' (I've seen this before) and 'emi' is found within the answer.
This explanation may well be incorrect...
'from' acts as a link.
(Other definitions for emissary that I've seen before include "Diplomatic representative" , "One sent" , "Person sent on a diplomatic mission" , "Diplomatic agent" , "one dispatched officially" .)