Adult making a noise around front of tavern, staggering (10)
I believe the answer is:
astounding
'staggering' is the definition.
(thesaurus)
'adult making a noise around front of tavern' is the wordplay.
'adult' becomes 'a' (abbreviation).
'making a noise' becomes 'sounding'.
'around' means one lot of letters goes inside another.
'front of' indicates taking the first letters.
The first letter of 'tavern' is 't'.
'sounding' going around 't' is 'stounding'.
'a'+'stounding'='ASTOUNDING'
(Other definitions for astounding that I've seen before include "Amazing" , "Stunning" , "Extraordinary" .)