Standard girl in empty bar (6)
I believe the answer is:
banner
'standard' is the definition.
(I've seen this before)
'girl in empty bar' is the wordplay.
'girl' becomes 'anne' (girl's name).
'in' means one lot of letters goes inside another.
'empty' means to remove the middle letters.
'bar' with its middle removed is 'br'.
'anne' placed within 'br' is 'BANNER'.
(Other definitions for banner that I've seen before include "Streamer for advertising" , "Flag used as standard" , "Kind of flag - sounds like censor" , "Standard; heading" , "Flag bearing a device" .)