Clue: Outside crease, bowled extremely nimble run scorer (8)
Answer: BRUCKNER
Explanation: Definition: scorer
*Outside* **RUCK** ("crease"), **B **(bowled) + [*extremely*] **N**(imbl)**E** + **R **(run) 
*Refers to the Austrian composer (i.e. one who writes scores, so "scorer"), Anton Bruckner (1824-96)