Crossword Puzzle Crowns of thorns

Clue: Crowns of thorns

Craft whose existence may be denied by government officials, thus proving its existence (UFO with 3 letters)
Museo offering (ARTE with 4 letters)
Post office call (NEXT with 4 letters)
Revolutionary War officer ___ Putnam (RUFUS with 5 letters)
Official blooms of Tennessee (IRISES with 6 letters)
Offer on eBay (e.g. BID with 3 letters)
Offers a new proposal (STEPSUPTOTHEPLATE with 17 letters)
Box-office hit (SMASH with 5 letters)
Brief news offering (UPDATE with 6 letters)
Health club offering (PERSONALTRAINER with 15 letters)