Can't Get Started

[maxidragon]

Most clues relate back to these two - help please. 14a) Unpleasant about the north? Not necessarily(8) and 15a) Edges of road screened - one of the things making wood invisible? (4) . These two make some sort of phrase that lots of other clues relate to. All help gratefully received, thankyou

[Svejk]

15. Rood?
as in rood screen which covers wood(with paint)

[Lie-in King]

14a Southern - 'sour' (unpleasant, about) 'the' + 'n(orth)' (?)
15a (s)Tree(t) - as "can't see the wood for the trees"

[Svejk]

Well done, lik. I was looking at these for ages. (wouldn't have got them, anyway)