### Clue: Leave a large group of old boozers about to invade part of pitch (4,4)
### Answer: GOAL AREA 
 ### Explanation: Definition: part of pitch
 GO(to leave/move away from) + A + L(abbrev. for "large") + AA(abbrev. for "Alcoholics Anonymous", a support group of former alcoholics/old boozers) **containing**(… to invade) RE(about/with reference to).
Defn: …/ground used for a game involving goal-scoring, … and which is sometimes invaded by groups of spectators.