Company of soldiers in hearing (6)

I believe the answer is:

troupe

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'company' is the definition.
(I know that company can be written as troupe)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for troupe that I've seen before include "Dance company" , "Our pet (anag) - company of performers" , "Cast" , "Performing company" , "tour?" .)

I've seen this clue in The Sunday Times.

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