Old lady returning with Heather into country (7)
I believe the answer is:
america
'country' is the definition.
(America is an example)
'old lady returning with heather' is the wordplay.
'old lady' becomes 'ma'.
'returning' is a reversal indicator.
'with' means one lot of letters go next to another.
'heather' becomes 'erica' (the plant genus Erica includes heather plants).
'ma' back-to-front is 'am'.
'am'+'erica'='AMERICA'
'into' acts as a link.
(Other definitions for america that I've seen before include "huge landmass" , "The USA" , "country targeted by 3 [ROMNEY]" , "Name of two continents" , "The superpower" .)