Formal, not drinking around European ship (6)
I believe the answer is:
dressy
'formal' is the definition.
(I've seen this in another clue)
'not drinking around european ship' is the wordplay.
'not drinking' becomes 'dry' (I've seen this in another clue).
'around' indicates putting letters inside.
'european' becomes 'E' (abbreviation e.g. EU).
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'e'+'ss'='ess'
'dry' enclosing 'ess' is 'DRESSY'.
(Other definitions for dressy that I've seen before include "Nattily attired, wearing stylish clothes" , "Liking to wear fancy or formal clothes" , "Stylish with regard to clothes" , "(Of clothes) suitable for a smart occasion" , "Elaborate" .)