Articulate lie about extravagant treat (8)
I believe the answer is:
literate
'articulate' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'lie about extravagant treat' is the wordplay.
'about' indicates putting letters inside.
'extravagant' is an anagram indicator (I've seen this in other clues).
'treat' anagrammed gives 'terat'.
'lie' enclosing 'terat' is 'LITERATE'.
Can you help me to learn more?
(Other definitions for literate that I've seen before include "Able to read and write" , "Scholarly" , "version of 'speed of light'?" , "properly educated" , "Well-read" .)