Urge a horse to take one around, possibly? (3,2)
I believe the answer is:
egg on
'urge' is the definition.
(to egg someone on is to urge them to do something)
'a horse to take one around possibly?' is the wordplay.
I cannot quite see how this works, but
'horse' could be 'gg' (geegee or GG is a childish term for a horse) and 'gg' is found in the answer.
an anagram of 'one' is 'eon' which is within the left over letters.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for egg on that I've seen before include "Encourage to act" , "Press" , "Fire" , "Urge (someone) to take risks" , "'Incite, urge (3,2)'" .)