Solutions The last decade has 13 entries with similar clues

• 3-letter words
• cadHe's a bit decadent
• 4-letter words
• nineAlmost a decade
• eloirace of decadent people in 1895 h g wells novel the time machine
• 5-letter words
• torteDecadent cake
• 6-letter words
• effeteDecadent
• marrowbone ...... [decadent dish)
• 8-letter words
• lutenistEarly music performer's initially unexpected decade in catalogue
• 9-letter words
• ten-yearsDecade
• 10-letter words
• degenerateDecadent
• 11-letter words
• eiffeltowerWorld's tallest structure for four decades, until surpassed by the Chrysler Building (2 wds.)
• baby-boomerSomeone born in the decade after WWII
• 12-letter words
• thenewyorkerWeekly periodical for which EB White was a writer and contributing editor for six decades (3 wds)
• 16-letter words
• swinging-sixties'With it' 20th-century decade