All answers are trees or contain a tree in them.

[flicrat]

20. Miss Fenty had a hit with this song. (8)
18. National park in Queensland, Australia (5,9).
31. Sci-fi drama. ( 9)
44. M.E.W.P (6,6) ????
Thanks for any help. I am quite bereft of ideas.

[Dinkypuzzled]

44. cherry picker

[JMR27]

31. There's a TV programme called Torchwood but I don't know if it is sci-fi.

[north star]

care to explain 44 please dinky

[JMR27]

18. Bunya Mountains

[flicrat]

Thank you both. I have no idea why cherry picker from those letters. Please put me out of my misery and explain
dinkypuzzled.
Torchwood probably is sci-fi. I seem to remember seeing a frightening trailer!

[JMR27]

20. Umbrella (Rihanna)

[Buenchico]

18. Bunya Mountains National Park is in Queensland

20. Miss Fenty is Rihanna, who had a hit with 'Umbrella'. (The umbrella tree is a native of Oz)

[Dinkypuzzled]

18. could be Bunya Mountains.

[Dinkypuzzled]

M E W P is a machine for fixing Street lights, trimming trees etc. ( commonly called a cherry-picker)

[Buenchico]

M E W P = 'mobile elevating work platform', otherwise known as a 'cherry picker'.

[Dinkypuzzled]

Mobile elevating work platforms (MEWPs)

[wallacia]

stands for,Mobile Extended Working Platform as in cherry picker or scissor lift.

[wallacia]

sorry you are right, elevating,i have my ticket should have remembered that.

[flicrat]

Thank you all very much. I am woefully ignorant it seems!!
I realise I also am stuck on 46.the spider species that share a name but not characteristics. Is it Orange baboon/

[north star]

thank you, knew what a cherry picker was, couldn't see the connection to the question.

[wallacia]

there is an orange baboon tarantula.

[Gennifer36]

try these for answers
20. Umbrella
18 Bunja Mountains

[flicrat]

Thank you wallacia. Yes, that is the aggressive one, but is there a non-venomous orange baboon? I am clutching at straws here.