Could be used to put out (6)
I believe the answer is:
ousted
'out' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives sometimes define each other.
'could be used to' is the wordplay.
'could be' indicates anagramming the letters.
'used'+'to'='usedto'
'usedto' anagrammed gives 'OUSTED'.
'put' is the link.
Can you help me to learn more?
(Other definitions for ousted that I've seen before include "Ejected or expelled" , "Expelled from office or power" , "Drove out or expelled from a position" , "Put or thrust out" , "Drove or ejected from office" .)