Some battalion is educatedly converted to ions, say (7)
I believe the answer is:
ionised
'ions say' is the definition.
The definition suggests a verb in its base form which matches the answer.
'some battalion is educatedly converted' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'IONISED' is hidden within 'battalion is educatedly converted'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for ionised that I've seen before include "I noised about and produced charged particles" , "without charge? On the contrary" .)