Honourable dignitary's after power lift (12)
I believe the answer is:
praiseworthy
'honourable' is the definition.
(worthy or honour or praise)
'dignitary's after power lift' is the wordplay.
'dignitary' becomes 'worthy' (I've seen this before).
'after' says to put letters next to each other.
'power lift' becomes 'praise' (nouns. I am not sure about the 'power' bit.).
'worthy' put after 'praise' is 'PRAISEWORTHY'.
Can you help me to learn more?
(Other definitions for praiseworthy that I've seen before include "Deserving of approval" , "Laudable" , "Admirable" , "Commendable" .)