Tiny piece about centrally stripped grammatical form (10)
I believe the answer is:
'grammatical form' is the definition.
(as in past and present participle in grammar)
'tiny piece about centrally stripped' is the wordplay.
'tiny piece' becomes 'particle' (I've seen this before).
'about' is an insertion indicator.
'centrally' says to take the centre.
The middle of 'stripped' is 'ip'.
'particle' placed around 'ip' is 'PARTICIPLE'.
(Other definitions for participle that I've seen before include "An adjective maybe" , "part of speech" , "Tracing, for example" , "Adjectival form of verb" , "Verb form that may be used as an adjective" .)