Somnolent, tired (6)
I believe the answer is:
drowsy
This clue is a double definition.
'somnolent' is the first definition.
(I've seen this in another clue)
'tired' is the second definition.
(I've seen this before)
(Other definitions for drowsy that I've seen before include "Nodding off" , "Sleepy, somnolent" , "Being rather tired" , "Half asleep" , "Dropping off" .)