Monks having troubles — right to intervene (8)
I believe the answer is:
brothers
'monks' is the definition.
(I've seen this in another clue)
'troubles right to intervene' is the wordplay.
I cannot really understand how this works, but
'right' could be 'r' (common abbreviation) and 'r' is found in the answer.
'troubles' could be 'bothers' ('bother' can be a synonym of 'trouble') and 'bothers' is found within the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'having' is the link.
Can you help me to learn more?
(Other definitions for brothers that I've seen before include "Siblings (in arms or in law?)" , "(Roman Catholic) monks" , "comrades" , "Jack and Algy turn out to be (Wilde)" , "See 5" .)