Girl sees two knights in AE (4)
I believe the answer is:
anne
'girl' is the definition.
(girl's name)
'two knights in ae' is the wordplay.
'two knights' can mean two substitutions for 'knight'.
'knight' becomes 'N' (chess abbreviation).
'knight' becomes 'N' (chess abbreviation).
'in' means one lot of letters goes inside another.
'n'+'n'='nn'
'nn' going into 'ae' is 'ANNE'.
'sees' acts as a link.
(Other definitions for anne that I've seen before include "Queen in 1702-14" , "'---- of Green Gables', novel by Lucy Maud Montgomery" , "First queen of Great Britain and Ireland" , "One of two Henry VIII wives" , "Girl's name" .)