### Clue: Tiny piece about centrally stripped grammatical form (10)
### Answer: PARTICIPLE 
 ### Explanation: Definition: grammatical form
 PARTICLE(a tiny piece/a very small portion of matter) **containing**(about) **middle 2 letters of**(centrally) "stripped".
Defn: …, specifically a word formed from a verb that can function as a verb as well as an adjective.