First of comedians gets a lot of laughs (6,2)
I believe the answer is:
cracks up
'laughs' is the definition.
(cracking up is a kind of laughing)
'first of comedians gets a lot of' is the wordplay.
'first of comedians' becomes 'c' (rst letter of 'comedians').
'gets' means one lot of letters go next to another.
'a lot of' becomes 'racksup' (I can't justify this - if you can you should give a lot more credence to this answer).
'c'+'racksup'='CRACKS UP'
Can you help me to learn more?
(Other definitions for cracks up that I've seen before include "Breaks down - reports on in glowing terms" , "bursts into laughter" .)