One who's indiferent to pain turns to ice? Not entirely (5)
I believe the answer is:
stoic
'one who's indiferent' is the definition.
I can't judge whether this definition defines the answer.
'pain turns to ice? not entirely' is the wordplay.
'not entirely' indicates the answer is hidden within the clue.
'STOIC' is hidden in the letters of 'pain turns to ice'.
'to' is the link.
Can you help me to learn more?
(Other definitions for stoic that I've seen before include "One patient under misfortune" , "Unflappable type" , "One who endures hardship uncomplainingly" , "One who doesn't complain" , "Person indifferent to pleasure or pain" .)