Onion recipe for colt in training school (4)
I believe the answer is:
ramp
'onion' is the definition.
The answer and definition can be both plants as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'recipe for colt in training school' is the wordplay.
'recipe' becomes 'r' (abbreviation in medical prescriptions).
'for' is a charade indicator (letters next to each other).
'colt in training school' becomes 'amp' (I can't justify this - if you can you should believe this answer much more).
'r'+'amp'='RAMP'
Can you help me to learn more?
(Other definitions for ramp that I've seen before include "aircraft steps?" , "Small ridge across a road - slow down" , "Slope - racket" , "Sloping path between levels" , "It gets travellers off" .)