Haitian gangster moving unnaturally? (7,3,5)
I believe the answer is:
against the grain
'unnaturally?' is the definition.
(in an unconventional way)
'haitian gangster moving' is the wordplay.
'moving' indicates anagramming the letters.
'haitian'+'gangster'='haitiangangster'
'haitiangangster' anagrammed gives 'AGAINST THE GRAIN'.
(Other definitions for against the grain that I've seen before include "like GM protesters?" , "Unnatural" , "Following the difficult route" , "contrary to one's inclination?" , "hostile to principles?" .)