Panelling, the centrepiece of Newark home, by Mackintosh perhaps (8)
I believe the answer is:
wainscot
'panelling' is the definition.
(I've seen this before)
'the centrepiece of newark home by mackintosh perhaps' is the wordplay.
I cannot quite see how this works, but
'of' could be 'o' and 'o' is located in the answer.
'home' could be 'in' ('he's home' can mean 'he's in') and 'in' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for wainscot that I've seen before include "Wooden board at the bottom of a wall" , "Fine quality oak" , "Lining of a wood-panelled wall" , "panels" , "I go up the wall" .)