Men wandering in the continent show loss of memory (7)
I believe the answer is:
amnesia
'loss of memory' is the definition.
(I've seen this in another clue)
'men wandering in the continent' is the wordplay.
'wandering' is an anagram indicator.
'in the' means one lot of letters goes inside another.
'continent' becomes 'asia' (Asia is an example).
'men' is an anagram of 'mne'.
'mne' put within 'asia' is 'AMNESIA'.
'show' is the link.
(Other definitions for amnesia that I've seen before include "Severe forgetfulness" , "Clinical state of forgetfulness" , "Recall trouble" , "Elephants won't suffer such" , "Main sea (anag.)" .)