Vision carried by padre ambitiously (5)
I believe the answer is:
dream
'vision' is the definition.
(dream is a kind of vision)
'carried by padre ambitiously' is the wordplay.
'carried by' says the answer is hidden in the clue.
'DREAM' can be found hidden inside 'padre ambitiously'.
(Other definitions for dream that I've seen before include "Fancy (usually 7)" , "Something imaginary" , "Aspiration" , "Illusion" , "Cherished hope or ideal" .)