Awake and fixing stair (5)
I believe the answer is:
astir
'awake' is the definition.
('astir' can be similar in meaning to 'awake')
'fixing stair' is the wordplay.
'fixing' is an anagram indicator.
'stair' anagrammed gives 'ASTIR'.
'and' is the link.
(Other definitions for astir that I've seen before include "In a state of movement" , "Moving; out of bed" , "Excitedly moving" , "Out of bed or on the move" , "abroad" .)