Removing top, streak beside female and show off? (6)

I believe the answer is:
unfair
'removing top streak' is the definition.
I can't tell whether this definition defines the answer.
'beside female and show off?' is the wordplay.
'beside' means one lot of letters go next to another.
'female' becomes 'f' (common abbreviation).
'and' means one lot of letters go next to another.
'show' becomes 'air' (both can mean broadcast).
'off?' becomes 'un' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'f'+'air'='fair'
'fair' put after 'un' is 'UNFAIR'.
Can you help me to learn more?
(Other definitions for unfair that I've seen before include "'Unjust, inequitable (6)'" , "Weighted" , "Dirty" , "not right" , "Partisan" .)
