Wicked drunk in bar still ignoring son (9)
I believe the answer is:
brilliant
'wicked' is the definition.
'drunk in bar still ignoring son' is the wordplay.
'drunk' is an anagram indicator.
'ignoring' suggests deleting specific letters.
'son' becomes 's' (genealogical abbreviation for son).
'in'+'bar'+'still'='inbarstill'
'inbarstill' with 's' removed is 'inbartill'.
'inbartill' anagrammed gives 'BRILLIANT'.
(Other definitions for brilliant that I've seen before include "Superb" , "Fantastic!" , "Glittering" , "Of surpassing excellence" , "Exceptionally clever" .)