Forgetfulness of men travelling in continent (7)
I believe the answer is:
amnesia
'forgetfulness' is the definition.
(I've seen this before)
'men travelling in continent' is the wordplay.
'travelling' is an anagram indicator.
'in' indicates putting letters inside.
'continent' becomes 'asia' (Asia is an example).
'men' anagrammed gives 'mne'.
'mne' placed within 'asia' is 'AMNESIA'.
'of' acts as a link.
(Other definitions for amnesia that I've seen before include "Memory-loss" , "Is a name (anag.)" , "Medical condition" , "As a mine (anag)" , "Pathological forgetfulness" .)