### Clue: One heading to nightclub to tuck into brew or a Bud (5)
### Answer: CHINA 
 ### Explanation: Definition: a Bud
 [I(Roman numeral for "one") + **1st letter of**(heading to) "nightclub"] **contained in**(to tuck into) CHA(a brew/cuppa tea).
Defn: …/buddy/mate/"china plate" in rhyming slang. Not Budweiser.