Opinions about recruits (5,2)

I believe the answer is:

takes on

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'recruits' is the definition.
The answer and definition can be both related to competing as well as being verbs in their -s form.
Maybe they are linked in a way I don't understand?

'opinions about' is the wordplay.
'opinions' becomes 'takes' (I've seen this in another clue).
'about' becomes 'on' (as in a book 'on' a certain topic).
'takes'+'on'='TAKES ON'

Can you help me to learn more?

(Other definitions for takes on that I've seen before include "becomes upset" , "Accepts challenge" .)

I've seen this clue in The Daily Express.

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