Meals increased, limiting student outburst (5-2)
I believe the answer is:
flare-up
'outburst' is the definition.
(I know that outburst can be written as flare-up)
'meals increased limiting student' is the wordplay.
'meals' becomes 'fare'.
'increased' becomes 'up' (something that's up has increased or risen).
'limiting' is an insertion indicator.
'student' becomes 'l' (as in L-plates for learner drivers).
'fare'+'up'='fareup'
'fareup' enclosing 'l' is 'FLARE-UP'.
(Other definitions for flare-up that I've seen before include "Burst into flame or become suddenly angry" , "Suddenly get angry" , "Sudden outbreak (of violence, etc)" , "Sudden outburst" , "Sudden burst of light" .)