### Clue: Quarrels stop intense desire returning before first thing on Sunday (7)
### Answer: BARNEYS 
 ### Explanation: Definition: Quarrels
 BAR(to stop by presenting a barrier, literally or figuratively) + **reversal of**(… returning) YEN(an intense desire/yearning for) **placed before**(before) **1st letter of**(first thing on) "Sunday".
Defn: …, especially noisy ones, in British slang.