Clue: Iconic cricket commentator supports a large number of stickers (7)
Answer: DAGGERS
Explanation: Iconic cricket commentator supports a large number of stickers (7)
**AGGERS** (nicknmae of ex-cricketer, now a *commentator*, Jonathan Agnew) *supports* **D** (500, so "a large number") 
*The Daggers are Dagenham & Redbridge.