Sybil absorbs temperature guide (5)
I believe the answer is:
steer
'guide' is the definition.
(I know that guide can be written as steer)
'sybil absorbs temperature' is the wordplay.
'sybil' becomes 'seer' (both can mean someone who sees the future).
'absorbs' means one lot of letters goes inside another.
'temperature' becomes 't' (abbreviation).
'seer' placed around 't' is 'STEER'.
(Other definitions for steer that I've seen before include "Navigate" , "Exercise control" , "Con" , "Guide, control" , "cow!" .)