Sentence:  Barcelona have had a habit of collapsing like a poorly constructed millefeuille in away legs over the past four years. But still, as Jordan Henderson hurled himself about in midfield like a labrador puppy chasing flies, as Mané pressed with sniping menace on the left, there was something <WSD>valedictory</WSD> in the air. 
Meaning of the word marked with <WSD> tags:  Bidding farewell; suitable or designed for an occasion of leave-taking.