Heading north in seeking victory? (4)
I believe the answer is:
nike
'victory?' is the definition.
(Nike is the Greek goddess of victory)
'heading north in seeking' is the wordplay.
'heading north' says the letters should be written backwards (in a down clue, letters travel north).
'in' says the answer is hidden in the clue.
'ekin' is hidden within 'seeking'.
'ekin' reversed gives 'NIKE'.
(Other definitions for nike that I've seen before include "Greek winged goddess of victory, and sports goods logo" , "Goddess of victory - clothing company" , "Victoria" , "Greek goddess, personification of victory" , "bringer of victory" .)