Popular support from the East for Asian country (5)
I believe the answer is:
india
'asian country' is the definition.
(country in Asia)
'popular support from the east' is the wordplay.
'popular' becomes 'in' ('in' can mean trendy).
'support' becomes 'aid' (to aid is to help or support).
'from the east' shows that the letters should be reversed in order (on a map from right to left).
'aid' in reverse letter order is 'dia'.
'in'+'dia'='INDIA'
'for' is the link.
(Other definitions for india that I've seen before include "South Asian republic" , "Cricket team" , "(Part of) subcontinent" , "Large Asian republic" , "vast country" .)