Betsy of flag fame (4)
I believe the answer is:
ross
'betsy of flag fame' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ross that I've seen before include "Macbeth nobleman; Antarctic sea" , "US singer Diana" , "Diana --, Motown singer" , "- and Cromarty, former Scottish county" , "Wye town; Antarctic sea" .)