Queen seen in banner (4)
I believe the answer is:
anne
'queen' is the definition.
(Queen Anne, 18th-century queen)
'in banner' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ANNE' is hidden within 'banner'.
'seen' is the link.
(Other definitions for anne that I've seen before include "Queen, daughter of James II" , "'---- of Green Gables', novel by Lucy Maud Montgomery" , "- - Hathaway, wife of Shakespeare" , "Henry's second" , "English queen" .)