Conjugated word (4)
I believe the answer is:
verb
'conjugated word' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for verb that I've seen before include "Word that denotes an action or a state" , "'In grammar, it denotes action (4)'" , "Predicate of a sentance (4)" , "Part of speech" , "The predicate of a sentence" .)