Crossword Genius

Fellow rep offering blood products (7)

Ross

I believe the answer is:

factors

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'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" .)

I've seen this clue in The Independent.
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