Infantile conveyance broke ramp (4)

I believe the answer is:
pram
'infantile conveyance' is the definition.
'pram' can be an answer for 'conveyance' (pram is a kind of conveyance). I'm not certain of the 'infantile' bit.
'broke ramp' is the wordplay.
'broke' indicates anagramming the letters.
'ramp' anagrammed gives 'PRAM'.
Can you help me to learn more?
(Other definitions for pram that I've seen before include "Baby transporter" , "accommodation for child" , "Ramp for a baby buggy" , "lighter" , "Cargo-boat" .)
