Philosopher is on something in company (7)

I believe the answer is:

platoon

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'company' is the definition.
(thesaurus)

'philosopher is on' is the wordplay.
'philosopher' becomes 'plato' (Plato is an example**).
'plato'+'on'='PLATOON'

'something in' is the link.
This may not be right. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for platoon that I've seen before include "Company's subdivision" , "Subdivision of a company" , "part of company" , "Team under lieutenant" , "Sub-unit of a military company" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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