Man in charge around court is frantically active (6)
I believe the answer is:
hectic
'frantically active' is the definition.
(I've seen this before)
'man in charge around court' is the wordplay.
'man' becomes 'he'.
'in charge' becomes 'ic'.
'around' means one lot of letters goes inside another.
'court' becomes 'ct'.
'he'+'ic'='heic'
'heic' going around 'ct' is 'HECTIC'.
'is' acts as a link.
(Other definitions for hectic that I've seen before include "Bustling" , "Agitated and rushed" , "in a rush" , "Furious" , "Frantic, busy" .)