A bit of a fight (5)
This clue is a double definition.
'a bit of' is the first definition.
(I've seen this before)
'a fight' is the second definition.
(a scrap is a minor fight)
(Other definitions for scrap that I've seen before include "Get rid of" , "Throw away - fight" , "Informal fight for waste material" , "Cancel; fight" , "Oddment" .)
'a bit of a fight' is the definition.
(Rounds in a boxing match)
'a bit' is the wordplay.
I cannot quite see how this works, but
'bit' could be 'o' (resembles 0, a binary digit or bit) and 'o' is present in the answer.
The remaining letters 'rund' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for round that I've seen before include "Approximate" , "ring" , "regular shape" , "Like ball < in rough" , "Full" .)