Rubber gloves idiot initially kept in chap's room (6)
I believe the answer is:
margin
'room' is the definition.
(thesaurus)
'rubber gloves idiot initially kept in chap's' is the wordplay.
'initially' suggests taking the first letters.
'kept in' is an insertion indicator.
'chap' becomes 'man' (chap can mean a man).
The first letters of 'rubber gloves idiot' is 'rgi'.
'rgi' placed within 'man' is 'MARGIN'.
(Other definitions for margin that I've seen before include "Edge, border, fringe" , "Blank space around a page" , "bank" , "Space at edge of page" , "Blank space that surrounds the text on a page" .)