Crossword Genius

'Farewell' bill island's presented by Brussels (5)

Ross

I believe the answer is:

adieu

'farewell' is the definition.
(adieu is a kind of farewell)

'bill island's presented by brussels' is the wordplay.
'bill' becomes 'ad' (advertisement stuck on wall).
'island' becomes 'i'.
'presented' is a charade indicator (letters next to each other).
'by' is a charade indicator (letters next to each other).
'brussels' becomes 'eu' (Brussels is a metonym for the European Union).
'ad'+'i'+'eu'='ADIEU'

(Other definitions for adieu that I've seen before include "I'm going" , "Au revoir (to a kind friend?)" , "Farewell (French)" , "Parting word" , "Farewell, Monsieur!" .)

I've seen this clue in The Telegraph.
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