Look up to exotic mermaid leaving stream finally (6)
I believe the answer is:
admire
'look up to' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for admire that I've seen before include "Goggle at" , "Hold in high respect" , "Respect greatly" , "Have a high opinion of" , "Dig" .)