Making a fuss about one’s flirting? (8,2)
I believe the answer is:
carrying on
This might be a double definition.
'making a fuss' is the first definition.
(I've seen this before)
'one's flirting?' is the second definition.
'carrying on' can be an answer for 'flirting?'. I'm not sure about the 'one's' bit.
'about' is the link.
(Other definitions for carrying on that I've seen before include "making a fuss" , "Not stopping" , "keeping it up" , "Seeing someone" , "questionable behaviour" .)