Run back around troops causing distress (7)
I believe the answer is:
torment
'distress' is the definition.
(torment is a kind of distress)
'run back around troops' is the wordplay.
'run back' becomes 'tort' (I can't explain this - if you can you should believe this answer much more).
'around' is an insertion indicator.
'troops' becomes 'men' (I've seen this in other clues).
'tort' going around 'men' is 'TORMENT'.
'causing' acts as a link.
Can you help me to learn more?
(Other definitions for torment that I've seen before include "Harry" , "Persecute" , "Pester or tease unmercifully" , "Anguish" , "Badger" .)