School, say, stands up for chubby type (5)
I believe the answer is:
podge
'chubby type' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'school say stands up' is the wordplay.
'school' becomes 'pod' (I've seen this in other clues).
'say' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'stands up' is a reversal indicator (in a down clue, letters go up).
'eg' reversed gives 'ge'.
'pod'+'ge'='PODGE'
'for' is the link.
Can you help me to learn more?
(Other definitions for podge that I've seen before include "Fatso" , "He needs exercise" , "Fat" , "One with pounds to spare" .)