Asleep, but prepared to slip away (6)
I believe the answer is:
elapse
'slip away' is the definition.
(synonyms)
'asleep but prepared' is the wordplay.
'asleep' anagrams to 'ELAPSE'.
However, I'm not clear how the anagram is indicated.
'to' is the link.
Can you help me to learn more?
(Other definitions for elapse that I've seen before include "Go past" , "Tick by" , "Slip away" , "Pass away - asleep (anag)" , "Of time, pass by - please" .)