1: Britannia - she never has blanched (5)
2: People going to Silver Lake to find animal collection (9)
4: Underworld biggie (and chief stoolie) is a rich and powerful person (9)
5: Nasal quality essentially irritates Vera (5)
6: Pervert stripped in mineral water (5)
7: Reportedly, guys take advantage of lists (5)
8: Castle ran out of ones forebears (9)
12: Emily gets into the topic (5)
14: Tick off and send back into custody to conceal rip-off (9)
16: Tiger seen roaming National Park (9)
17: Transfixes the finger-tips (5)
18: Vaudeville star to lead opening of Angela's Grandma (3,6)
22: Mystic eats piece of donut in ritual meal (5)
23: Goes bad and accepts never-ending abuses of the system (5)
24: Acquire something enclosed by muslin curtain (5)
26: Flower shop nosh about $41 (5)
28: Nightwear and jersey top added in afterthought (3)