Sir Lancelot

[jenspa1]

can anyone help with the following.

17a. second oral presentation for a form of energy supply/ of our star
I have -S?L?R is it solar?
9d. leg joints/joints described from salutation to letter's closing remarks (4)
?I?S
8d, ceremonies/is the author (without wife) of religous ceremonies (5)
R?T?S is it rites?
20d. he makes things less coarse / sugar manufacturer finds note more peasant R?F?N?R. is that refiner?

Thanks in advance

[grasscarp]

17a yes
9d hips
8d yes
20 yes

[Oldred]

9d hi ps

[dannyk13]

17a,Yes, s+anagram of oral)
9d.Hi ps
yes (w)rites
yes

[mazie]

17a yes oral (anag) + s (second)

[grasscarp]

17 s plus oral anagram
8 writes without 2

[Lie-in King]

17a Yes, 'Solar' - s'(econd)' + anag 'oral'
9d Hips - 'hi' (salutation) + 'PS' (closing to letter...)
8d Yes, 'Rites' - '(W)rites' (is the author, no w[ife])
20d Yes, 'Refiner' - 're' (musical note) + 'finer' (more pleasant)