Across
1 Its ways of viewing venomous snake and sect of a kind (7) ASPECTS
5 Possibly an assistant to a waiter? (7) OMNIBUS
9 Sailor managed to remain on river (7) MARINER
10 Revised night note will be too close to deviate from plan (7) TIGHTEN
11 American Indian Ute tribe are rightly set to be more accurately adjusted (5) TRUER
12 An indoor game of trifling importance (9) BAGATELLE
13 Revolutionary action of libel infuriated Nero (9) REBELLION
15 Posse drawn to recover Mexican dollars (5) PESOS
16 Graduate goes to Rio to meet a cartoonist! (5) MARIO
18 Pitched into an ugly villain without any effect (3,2,4) ALL IN VAIN
21 Sin compounded by voters who are out to make money (9) INVESTORS
24 Save so to speak, from the mob (5) HORDE
25 Stroke of luck — like a rich vein of precious ore (7) BONANZA
26 Body directing affairs of a town (7) COUNCIL
27 Tough interrogators of postage changes (7) GESTAPO
28 Afternoon sleep hours (7) SIESTAS
Down
1 Scholar returns with instrument to measure current (7) AMMETER
2 Flourish old city, British want to greatly disturb (7) PERTURB
3 The lowest female singing voice (9) CONTRALTO
4 Abandon plans to cover country with brushwood (5) SCRUB
5 Strange shape for a long coat (9) OCTAGONAL
6 There’s a curious thing at the end of the day (5) NIGHT
7 Finally permits racket use for contest of opposing parties (7) BATTLES
8 Separates when below, harboured by ship (7) SUNDERS
14 Beloved old sailor back in low environment (9) INAMORATO
15 Accommodation for top people? (9) PENTHOUSE
16 Wrap up sack for the post (7) MAILBAG
17 Painter draws grape plants in deep gorges (7) RAVINES
19 Fruit that’s quite new to Capri (7) APRICOT
20 Goads one to a feeling of irritation (7) NEEDLES
22 Devout one distributes presents in the last month (5) SANTA
23 Plunders dry white wines from Spain (5) SACKS