Come back from Peru? Certainly, heading west (5)
I believe the answer is:
recur
'come back' is the definition.
(recurring is a kind of coming back)
'from peru? certainly heading west' is the wordplay.
'from' says the answer is hidden in the clue.
'heading west' shows that the letters should be reversed in order.
'rucer' is hidden within 'peru certainly'.
'rucer' written backwards gives 'RECUR'.
(Other definitions for recur that I've seen before include "come back to one's mind" , "expected to return" , "Persist" , "Happen again (5)" , "Happen repeatedly" .)