Rule out supporting a learner one's interested in (5,2)

'interested in' is the definition.
(someone alive to something is interested in it)

'rule out supporting a learner one's' is the wordplay.
'rule out' becomes 'veto' (to veto something is to block it or rule it out).
'supporting' is a charade indicator (letters next to each other) (in a down clue, some letters go below others).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'one' becomes 'i' (Roman numeral).
'a'+'l'+'i'='ali'
'veto' after 'ali' is 'ALIVE TO'.