1a
What we may have in summer for a period of instruction
(6)
4a
Give away extremely useful key in seedy bar
(7)
9a
Jacob's father lives with a retired accountant
(5)
10a
Mad Peter and I out for a spin
(9)
11a
Oddly it draws in a believer in natural selection
(9)
12a
Slow road engulfed by Scottish river
(5)
13a
Way in which third of wolves utter plaintive cries
(4)
14a
Country house girl introducing European verse form
(10)
18a
Wasteful academic delayed welcoming soldier back
(10)
20a
Excessively sentimental message? Not entirely
(4)
23a
Ambassador in temperate area — a character!
(5)
24a
Snowslip burying a northern church in a dale
(9)
25a
Scented mixture first brought back for French king and emperor
(9)
26a
Storyline inspiring current TV try-out, perhaps
(5)
27a
Like some wine yours truly had talked of, showing no emotion
(3-4)
28a
Worsted yarn wife found in fish basket
(6)
Down
1d
One visiting fat son with joint landowner's position
(9)
2d
Flyer's broadcast gripping sixth wife
(7)
3d
Plant soldiers concealed outside entrance to camp
(6)
4d
Dared do cleaner's job, getting round resistance
(5)
5d
Leaping over arched work in roof
(8)
7d
8 soldiers stopping the old adversary
(5)
8d
Union leader forcing insurrection
(8)
15d
Libertine group originally haunting a former capital
(8)
16d
Primitive tribe finally allowed a man to keep servants
(9)
17d
Drink a politician offered, depending on chance
(8)
19d
Devout Cockney crossing green in full view
(7)
21d
Reason for fading light in part of Leinster?
(7)
22d
A holiday-maker is more affected
(6)
23d
Lukewarm fare served up quietly inside
(5)
24d
Pungent account run by certain papers
(5)