Park at higher speed at a tube station (5)
I believe the answer is:
upton
'park' is the definition.
I know nothing about this answer so I can't judge whether this works.
'higher speed at a tube station' is the wordplay.
I cannot really understand how this works, but
'higher' could be 'up' and 'up' is found within the answer.
'speed' could be 'ton' (I've seen this before) and 'ton' is located in the answer.
No letters remain.
This explanation may well be incorrect...
'at' acts as a link.
Can you help me to learn more?
(Another definition for upton that I've seen is " West Ham's Park".)