It indicates the gang, I suspect, somewhat set up (7)
I believe the answer is:
signage
'it indicates' is the definition.
(a sign indicates something)
'the gang i suspect somewhat set up' is the wordplay.
'somewhat' indicates a hidden word.
'set up' is a reversal indicator (in a down clue, letters go up).
'egangis' can be found hidden inside 'the gang i suspect'.
'egangis' reversed gives 'SIGNAGE'.
(Other definitions for signage that I've seen before include "Informative notices in general" , "Means of communication" .)