Domain abandoned, heading for country, wandering homeless (7)
I believe the answer is:
nomadic
'wandering homeless' is the definition.
(nomadic means travelling with no fixed home)
'domain abandoned heading for country' is the wordplay.
'abandoned' is an anagram indicator (the original order is abandoned).
'heading for' indicates taking the first letters.
The first letter of 'country' is 'c'.
'domain' with letters rearranged gives 'nomadi'.
'nomadi'+'c'='NOMADIC'
(Other definitions for nomadic that I've seen before include "Homeless - wandering" , "Peripatetic" , "Wandering from place to place, with no permanent home" , "Unsettled" , "Drifting off" .)