### Clue: Purchase about 50 books first, like Barbara Windsor? (6)
### Answer: BUBBLY 
 ### Explanation: Definition: like Barbara Windsor
 BUY(to purchase) **containing**(about) [ L(Roman numeral for 50) **placed after**(… first) BB(twice abbrev. for "book") ].
Defn: …, especially in the Carry On films.