Forgetting men out in Asia (7)
I believe the answer is:
amnesia
'forgetting' is the definition.
(I've seen this before)
'men out in asia' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'in' indicates putting letters inside.
'men' with letters rearranged gives 'mne'.
'mne' going into 'asia' is 'AMNESIA'.
(Other definitions for amnesia that I've seen before include "Completely forgetting" , "Seaman I found in state of memory loss" , "Inability to recall" , "Mental condition" , "Defect in memory" .)