Firm's publicity getting fine in rogue states (9)
I believe the answer is:
steadfast
'firm's' is the definition.
(synonyms)
'publicity getting fine in rogue states' is the wordplay.
'publicity' becomes 'ad' (short for advertisement).
'getting' is a charade indicator (letters next to each other).
'fine' becomes 'f' (abbreviation in pencil classifications).
'in' means one lot of letters goes inside another.
'rogue' indicates anagramming the letters (letters go rogue).
'ad'+'f'='adf'
'states' with letters rearranged gives 'steast'.
'adf' going within 'steast' is 'STEADFAST'.
(Other definitions for steadfast that I've seen before include "Resolutely unwavering" , "Firm, fixed and faithful" , "Dependable, unwavering" , "Firm and unwavering" , "Constant and resolute" .)