1) Amphetamines 2) Certain berths 3) Footwear parts 4) Pep pills 5) Pullman facilities 6) Shoe parts 7) Slang for stimulant drugs 8) Some berths 9) Some berths or dentures 10) Some bunks 11) Some dentures 12) Some dentures or berths 13) Some teeth or berths 14) Stimulants 15) Top berths Found on https://www.crosswordclues.com/clue/uppers
The upper winds, or winds at exit altitude. The "uppers" are often much stronger and occasionally from a different direction than ground winds Found on http://www.encyclo.co.uk/local/20082