Charged ion later releasing energy after moving (2,5)
I believe the answer is:
on trial
'charged' is the definition.
'ion later releasing energy after moving' is the wordplay.
'releasing' is a deletion indicator.
'energy' becomes 'e' (physics symbol as in E=mc2).
'after' is a charade indicator (letters next to each other).
'moving' indicates anagramming the letters.
'later' with 'e' removed is 'latr'.
'ion'+'latr'='ionlatr'
'ionlatr' with letters rearranged gives 'ON TRIAL'.
(Other definitions for on trial that I've seen before include "Subject to being found satisfactory" , "Probationary" , "heard?" , "Undergoing scrutiny" , "In court to answer charges" .)