Caught inside local having a delicious beverage (6)
I believe the answer is:
nectar
'a delicious beverage' is the definition.
'caught inside local' is the wordplay.
'caught' becomes 'ct'.
'inside' means one lot of letters goes inside another.
'local' becomes 'near'.
'ct' inserted within 'near' is 'NECTAR'.
'having' acts as a link.
(Other definitions for nectar that I've seen before include "Food of gods" , "Suggary stuff in plants to attract insects" , "From which 18dn is made" , "Sweet liquid secretion to attract pollinators" , "Recant (anag.)" .)