Country needing popular support after revolution (5)
I believe the answer is:
india
'country' is the definition.
(I know that India is a country)
'popular support after revolution' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'support' becomes 'aid' (to aid is to help or support).
'after revolution' says the letters should be written in reverse (letters revolve back).
'aid' backwards is 'dia'.
'in'+'dia'='INDIA'
'needing' acts as a link.
(Other definitions for india that I've seen before include "Large subcontinent of Asia" , "where to ring for help?" , "Type of paper, rubber etc" , "Commonwealth state" , "Land in Asia" .)