It can't be too hot too think as I've managed about two-thirds of this, but the bottom left corner is proving obstinate.
Assistance with these may stimulate me :
32A - Take off over area of grassland and brush (4, 6)
?O?K ??????
41A - Because airport's close, our home proved extremely expensive (4, 3, 5)
???T ??? ?????
&
25D - Criminal retreats with Engineer's coat - could it add to the charge (9)
??N??????
Any letters I've cited may be erroneous.
I'll come back to this after some time away.