Recall some returning from trek overseas (5)
I believe the answer is:
evoke
'recall' is the definition.
(thesaurus)
'some returning from trek overseas' is the wordplay.
'some returning' says the letters should be written backwards.
'from' says the answer is hidden in the clue.
'ekove' is hidden within 'trek overseas'.
'ekove' written backwards gives 'EVOKE'.
(Other definitions for evoke that I've seen before include "Conjure up" , "Call to mind (memories)" , "Call up; elicit" , "Draw forth (memories)" , "Recall" .)