Pirate getting sozzled, condition produced by pre-dinner drink (8)
I believe the answer is:
aperitif
'pre-dinner drink' is the definition.
(I've seen this before)
'pirate getting sozzled condition produced by' is the wordplay.
'getting sozzled' indicates an anagram (sozzled can mean drunk and therefore disordered).
'condition' becomes 'if' (I've seen this in other clues).
'produced by' means one lot of letters go next to another.
'pirate' is an anagram of 'aperit'.
'aperit'+'if'='APERITIF'
(Other definitions for aperitif that I've seen before include "it's served before dinner" , "Pre-dinner drink" , "Preliminary drink" , "Pre-nosh tipple?" , "wine, possibly, before meal" .)