Orchestrate popular support to billet troops (10)
I believe the answer is:
instrument
'orchestrate' is the definition.
(thesaurus)
'popular support to billet troops' is the wordplay.
I cannot quite understand how this works, but
'popular' could be 'in' and 'in' is found in the answer.
'troops' could be 'men' (I've seen this in other clues) and 'men' is located in the answer.
'support' could be 'strut' (strut is a kind of support) and 'strut' is found in the leftover letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for instrument that I've seen before include "legal document" , "power" , "Joanna, perhaps" , "What's needed for 1 [MUSICIAN]" , "Means of precision work (or music-making)" .)