Sentence:  I can't have been the only person, last week, to feel a rush of <WSD>nostalgia</WSD> upon learning that Thames Water had removed a bus-sized, 15-tonne lump of food fat ("mixed with wet wipes") from the sewers under London. The fatberg was an August news story redolent of the old-fashioned silly season. 
Meaning of the word marked with <WSD> tags:  A bittersweet yearning for the things of the past.