Walk across Iran, oddly getting affable (7)
I believe the answer is:
amiable
'affable' is the definition.
('amiable' can be a synonym of 'affable')
'walk across iran oddly' is the wordplay.
'walk' becomes 'amble' (amble is a kind of walk**).
'across' is an insertion indicator.
'oddly' means one should take alternating letters.
The alternate letters of 'iran' are 'ia'.
'amble' placed around 'ia' is 'AMIABLE'.
'getting' is the link.
(Other definitions for amiable that I've seen before include "'Friendly, pleasant and good-tempered (7)'" , "Charming" , "Lovable, friendly" , "'Affable, genial (7)'" , "Friendly and good-natured (7)" .)