Across
1
Undercover, American seen on rugby pitch twice? (4-4)
5
Protection for art students in the first instance sitting practice exams (6)
10
Star knocked back nearly a half of Benedictine (5)
11
Regrettably icy moment, representative of the bigger picture (9)
12
Stopped by Port of London Authority, bill recalled for our neighbour (3,6)
13
Reportedly change train’s destination? (5)
14
Provide food including – finally! – sugar bowl (6)
15
Picture puzzles – about 16 and more? (7)
18
Almost hassle-free, they’re used with mortars (7)
20
Appropriate drinks passed around local characters (6)
22
Some are Olympian, running these round their rivals? (5)
24
Star has been here – problem for Starmer’s lot? (5,4)
25
Uninjured? Surprisingly alive, having got on it (9)
27
Old flame damaged tree somewhere in Devon (6)
28
Laureate composed sonnet about New York (8)
Down
1
Ivy can be found in impoverished eras (6)
2
They fly nighttime weapon aboard planes (4-5)
3
Work close up with the Beeb to install lake observatory (6,9)
4
Group of undergrads mostly smearing bananas (7)
6
What may make you lament? (6,9)
7
Ludwig in bed, a heavenly body?! (5)
8
Safest for armistices, on reflection, to include El Salvador (8)
9
I announce small potato (6)
16
What may be booked for field trip? Inappropriately, Soho clubs (6,3)
17
Loosened rivets on wall of toilet facility, being playful (8)
20
Made tipsy upon entering wicked world of scholarship (7)
21
Genius running after salamander (6)
23
Stars suddenly brighter and twinkly on average, before storm (5)