Bar in park is about to introduce drinks in guide that appeals to cruciverbalists (8)
I believe the answer is:
preclude
'bar' is the definition.
(thesaurus)
'park is about to introduce drinks in guide that appeals to cruciverbalists' is the wordplay.
I cannot quite see how this works, but
'park' could be 'rec' (I've seen this in other clues) and 'rec' is found in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for preclude that I've seen before include "Make impossible" , "Debar" , "Prevent (something) from happening" , "Prevent, prohibit" , "Rule out or eliminate" .)