Country providing aid in trouble (5)
I believe the answer is:
india
'country' is the definition.
(India is an example)
'aid in trouble' is the wordplay.
'trouble' indicates an anagram.
'aid'+'in'='aidin'
'aidin' with letters rearranged gives 'INDIA'.
'providing' is the link.
(Other definitions for india that I've seen before include "where to ring for help?" , "Major sub-continent of Asia" , "The world's most populous democracy" , "Code for the letter I" , "Large subcontinent of Asia" .)