Troublesome spirit caught by roving gang (7)
I believe the answer is:
nagging
'troublesome' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I don't see?
'spirit caught by roving gang' is the wordplay.
'spirit' becomes 'gin' (alcoholic spirit).
'caught by' indicates putting letters inside.
'roving' indicates an anagram.
'gang' is an anagram of 'nagg'.
'gin' inserted within 'nagg' is 'NAGGING'.
Can you help me to learn more?
(Other definitions for nagging that I've seen before include "Pestering, plaguing" , "Persistent (toothache)" , "Complaining continuously" , "Persistently worrying" , "Continually complaining or faultfinding" .)