Such radio you can get to be mates with (5)
I believe the answer is:
steam
'such radio you can' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'to be mates with' is the wordplay.
'mates' can be anagrammed to 'STEAM'.
But, I'm not sure how the anagram is indicated.
'get' is the link.
Can you help me to learn more?
(Other definitions for steam that I've seen before include "Pre-digital" , "Vapour from water at boiling point" , "Driving force" , "Kind of power" , "Watery vapour" .)