Fixing one's hair and going down (7)
I believe the answer is:
setting
This might be a double definition.
'fixing one's hair' is the first definition.
'setting' can be an answer for 'fixing' ('set' can be a synonym of 'fix'). I am not certain of the 'one's hair' bit.
'going down' is the second definition.
('set' can be a synonym of 'go down')
'and' acts as a link.
Can you help me to learn more?
(Other definitions for setting that I've seen before include "Going down (of the sun)" , "Mount for gem" , "Gem''s mounting - stage scenery" , "approaching the horizon" , "indicating presence of game" .)