Terrible gents in rags, maybe (9)

I believe the answer is:
gangsters
'terrible gents in rags maybe' is the definition.
I can't judge whether this defines the answer.
'terrible gents in rags maybe' is the wordplay.
'terrible' indicates anagramming the letters.
'in' indicates putting letters inside.
'maybe' is an anagram indicator.
'gents' is an anagram of 'ngste'.
'rags' is an anagram of 'gars'.
'ngste' placed within 'gars' is 'GANGSTERS'.
Can you help me to learn more?
(Other definitions for gangsters that I've seen before include "Groups of criminals" , "robbers" .)
