Eloquent liar ate cut in pieces (10)
I believe the answer is:
articulate
'eloquent' is the definition.
(similar in meaning)
'liar ate cut in pieces' is the wordplay.
'in pieces' indicates anagramming the letters.
'liar'+'ate'+'cut'='liaratecut'
'liaratecut' anagrammed gives 'ARTICULATE'.
(Other definitions for articulate that I've seen before include "well-spoken" , "Clearly stating view" , "Eloquent" , "Provide joint" , "of joints" .)