Abandon The Waste Land (6)
I believe the answer is:
desert
This clue is a triple definition!
'abandon' is the first definition.
(desert can mean to leave or abandon)
'the waste' is the second definition.
(a desert may be described as a wasteland)
'land' is the third definition.
(I have seen 'infertile land' mean 'desert' so perhaps 'land' could also mean 'desert')
(Other definitions for desert that I've seen before include "Abandon in wasteland" , "Abandon - barren region" , "Abandon in Sahara" , "Callously abandon" , "Treacherously abandon" .)