Complicated procedure agitating a girl more (9)
I believe the answer is:
rigmarole
'complicated procedure' is the definition.
(I've seen this in another clue)
'agitating a girl more' is the wordplay.
'agitating' indicates anagramming the letters.
'a'+'girl'+'more'='agirlmore'
'agirlmore' with letters rearranged gives 'RIGMAROLE'.
(Other definitions for rigmarole that I've seen before include "Complicated business" , "A grim role for long rambling statement" , "Elaborate procedure" , "fuss" , "Performance" .)