Leaves to create drink regularly offered in the bar (3)
I believe the answer is:
tea
'leaves to create' is the definition.
(tea leaves)
'regularly offered in the bar' is the wordplay.
'regularly offered in' means one should take alternating letters (letters selected at regular intervals).
'the'+'bar'='thebar'
The alternate letters of 'thebar' are 'TEA'.
'drink' is the link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for tea that I've seen before include "Assam, for instance" , "Cha" , "Elevenses" , "Hot infusion" , "Beverage from leaves" .)