In Bognor see Vikings? (5)
I believe the answer is:
norse
'vikings?' is the definition.
(I've seen this in another clue)
'in bognor see' is the wordplay.
'in' says the answer is hidden in the clue.
'NORSE' is hidden within 'bognor see'.
(Other definitions for norse that I've seen before include "Old Scandinavian tongue" , "Relating to ancient Scandinavia" , "These men were Vikings" , "Old form of Norwegian" , "Relating to ancient Scandinavian" .)