Inability to recall men wandering in Asia (7)
I believe the answer is:
amnesia
'inability to recall' is the definition.
(I've seen this before)
'men wandering in asia' is the wordplay.
'wandering' indicates an anagram.
'in' is an insertion indicator.
'men' anagrammed gives 'mne'.
'mne' inserted into 'asia' is 'AMNESIA'.
(Other definitions for amnesia that I've seen before include "memory problem" , "Recall trouble" , "Clinical state of forgetfulness" , "Seaman I found in state of memory loss" , "Main sea (anag.)" .)