Times,4594.

[red46]

12a, 3words, 2.3.3. In The ?I?, Place for a lark when unsettled.
14d, 2words, 6.3. Estate ???, Vehicle, say in competition upset.
18d, D?????n, Leather serves one's family.
22a, ??s?t?, Substitute needed by keepers at zoo.
24a, 2words, 5.5. ?u??? D?u??, Dazed after lots of hot, spiced booze?.
26a, S???p?, Just manage to get ecstasy afte a struggle.

[vakayu]

18d doeskin?

[pixie373]

12 in the air
24 punch drunk
26 scrape

[Captain2]

12a In the air
14d Estate Car

[Mamyalynne]

In the air

Estate car

Doeskin

Ersatz

Punch drunk

Scrape

[vakayu]

24a punch drunk

[kettledrum]

18d doeskin
14 d estate car - state (in) race reversed

[Lie-in King]

12a In the air
14d Estate car - 'state' (say, in) 'race' (competition, upset)
18d Does-kin
22a "...keep ERS AT Z oo"
24a Punch-drunk
26a Scrap-E(cstasy)

[red46]

Thank you all for your help, very grateful.