In teas one may find an exotic infusion (6)
I believe the answer is:
tisane
'an exotic infusion' is the definition.
'tisane' can be an answer for 'infusion' (I've seen this before). I am not certain of the 'an exotic' bit.
'in teas one' is the wordplay.
'in teas' becomes 'tis' (I can't justify this - if you can you should believe this answer much more).
'one' becomes 'ane' (synonyms).
'tis'+'ane'='TISANE'
'may find' is the link.
Can you help me to learn more?
(Other definitions for tisane that I've seen before include "Herb-tea" , "Infusion (eg of herbs or flowers)" , "Herbal infusion" , "Herb tea" , "relaxing drink" .)