A large hall for study and lessons (9)
I believe the answer is:
concourse
'a large hall' is the definition.
'concourse' can be an answer for 'hall' (concourse is a kind of hall). I am not certain of the 'a large' bit.
'study and lessons' is the wordplay.
'study' becomes 'con' (conning is a kind of studying).
'and' says to put letters next to each other.
'lessons' becomes 'course' (a course has lessons).
'con'+'course'='CONCOURSE'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for concourse that I've seen before include "Open area in or outside a public building" , "A gathering of people" , "Large area in, eg, railway station" , "Large public area" , "spacious area?" .)