Climb up getting, at one point, quite hot (5)
I believe the answer is:
swarm
'climb up' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their base form.
Perhaps you can see a link between them that I don't see?
'at one point quite hot' is the wordplay.
'at' means one lot of letters go next to another.
'one point' becomes 'S' (South).
'quite hot' becomes 'warm' (I've seen this before).
's' put next to 'warm' is 'SWARM'.
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for swarm that I've seen before include "Crowd of e.g. bees" , "Large number" , "Army" , "Move in large numbers like locusts" , "Hive" .)