Hills, for one, is hot to trot! (5)
I believe the answer is:
hoist
'hills' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'one is hot to trot' is the wordplay.
'to trot' indicates anagramming the letters (I've seen 'trotting' mean this (letters walk or trot around)).
'is'+'hot'='ishot'
'ishot' with letters rearranged gives 'HOIST'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for hoist that I've seen before include "Lift using pulley and ropes" , "elevator" , "Lift with ropes and pulleys" , "Lift with rope and pulley" , "Jack" .)