Info in girl's meeting plans (7)
I believe the answer is:
agendas
'meeting plans' is the definition.
(I've seen this in another clue)
'info in girl's' is the wordplay.
'info' becomes 'gen' (informal term for information).
'in' means one lot of letters goes inside another.
'girl's' becomes 'ada's' (girl's name).
'gen' placed into 'adas' is 'AGENDAS'.
(Other definitions for agendas that I've seen before include "Lists of matters to be taken up at meetings" , "Committee-matters" , "Orders of business" , "programmes" , "Schedules" .)