Infusion from nuclear fission melts away (6)

I believe the answer is:

clears

I'm a little stuck... Click here to teach me more about this clue!

'melts away' is the definition.
The definition and answer can be both related to change as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?

'infusion from nuclear fission' is the wordplay.
'from' indicates named letters should be taken away.
'nuclear'+'fission'='nuclearfission'
'nuclearfission' with 'infusion' removed is 'CLEARS'.

Can you help me to learn more?

(Other definitions for clears that I've seen before include "Empties" , "Exonerates" .)

I've seen this clue in the Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.