1: Went ahead and used the power button (7,2)
 2: Scenery has to get down by starting 12-across (7,6)
 3: You audibly ram partner (3)
 4: Shepherd, at times, is more abrupt in tone (7)
 6: Girl mostly into turning inside out - it's never ending! (11)
 7: City that cowboys used to avoid (5)
 9: Feeble deception overheard (5)
 10: Nick shouts - and theres trouble brewing! (3,5,2,3)
 12: Sent one page rewritten in military lingo (11)
 16: Cut material had value (9)
 19: Entertains crowds (5)
 20: Aboard a ship is shipping magnate (7)
 21: Flower, large one, set up outside (5)
 25: Vet theatre opening 8-down (3)