Awakens some October, mysteriously. (5,2)
I believe the answer is:
comes to
'awakens' is the definition.
(I've seen this in another clue)
'some october mysteriously' is the wordplay.
I cannot quite see how this works, but
an anagram of 'some' is 'omes' which is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for comes to that I've seen before include "Makes" , "costs" , "After eg heavy blows, recovers" , "Gets as far as - wakes up" , "Revives" .)