Fellow rep offering blood products (7)
I believe the answer is:
factors
'blood products' is the definition.
The definition and answer can be both related to thinking as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'fellow rep' is the wordplay.
I cannot really understand how this works, but
'fellow' could be 'f' (abbreviation - of a society etc.) and 'f' is found in the answer.
The remaining letters 'actors' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'offering' acts as a link.
Can you help me to learn more?
(Other definitions for factors that I've seen before include "Agents" , "Circumstances that contribute to a result" .)