Cryptic crossword No 4,160

Down

• 1 downSigns my cat chewed mat - routine (10)
• 2 downOily tree found in Africa's heartlands (4)
• 3 downTransferred from Los Angeles for prom? (6)
• 4 downMore overweight? Global trend upset here, essentially (6)
• 5, 27 downWhopper's rival - Scottish giant? (3,3)
• 6 downWoeful US single, Unpleasant Behaviour (8)
• 7 downTravellers in train set that's broken down (10)
• 8 downFirst signs of winter (or névé), sometimes falling up? (4)
• 14 downVicar apprehended by sanctimonious, vacuous lady beforehand (10)
• 15, 19a downBroadcasting static to take care of queen? (3-3)
• 16 downImpair gals going wild, stealing ideas? (10)
• 18 downRotating clue for gin? (8)
• 19 downShoes, but only the odd ones? Call for assistance (3)
• 22 downMonsieur Claude for one, of French nationality originally, becomes English mademoiselle? (6)
• 23 downPassable spammer: "Nut", says Spooner (3,3)
• 24 downBloodsucker's approval? (4)
• 26 downArcher of legend, a sign that he's lying? (4)
• 27 downSee 5d