Heather, or another lady (5)
I believe the answer is:
erica
'heather' is the definition.
(the plant genus Erica includes heather plants)
'another lady' is the wordplay.
'another' becomes 'e' (I've seen this in other clues).
'lady' becomes 'rica' ().
'e'+'rica'='ERICA'
'or' acts as a link.
(Other definitions for erica that I've seen before include "growing up on the moors" , "Heath genus; girl's name" , "Girl - heather" , "Heather's Latin name?" , "Female" .)