Provide e.g. food and support for future admiral, say (11)
I believe the answer is:
caterpillar
'future admiral say' is the definition.
(admiral is a type of butterfly)
'provide e g food and support' is the wordplay.
'provide e g food' becomes 'cater' (cater means to provide food).
'and' is a charade indicator (letters next to each other).
'support' becomes 'pillar' (pillar is a kind of support).
'cater'+'pillar'='CATERPILLAR'
'for' acts as a link.
(Other definitions for caterpillar that I've seen before include "Tiny creature" , "He made do with a mushroom" , "Track" , "potential beauty?" , "Moth/ butterfly larva" .)