Comedy film that'll have you thinking of better activities? (1,3,2,3,5)
I believe the answer is:
a day at the races
'comedy film' is the definition.
'a day at the races' can be an answer for 'film' (I've seen this before). I'm unsure of the 'comedy' bit.
'that'll have you thinking of better activities?' is the wordplay.
I cannot really understand how this works, but
'you' could be 'ya' (non-standard spelling as in 'see ya later') and 'ya' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for a day at the races that I've seen before include "what a gambler might spend?" , "Marx Brothers' flick" , "Time for a better" , "picture of Marxist antics?" , "Marx Brothers film (1,3,2,3,5)" .)