Intend to go first class to Maidenhead (3)
I believe the answer is:
aim
'intend' is the definition.
(aiming is a kind of intending)
'first class to maidenhead' is the wordplay.
'first class' becomes 'ai' (A1 - top quality).
'to maidenhead' becomes 'm' (head letter of 'maiden').
'ai'+'m'='AIM'
'to go' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for aim that I've seen before include "Try to achieve" , "road?" , "Goal, objective" , "End" , "Direct; intention" .)