Gets tired note about block (9)
I believe the answer is:
flagstone
'block' is the definition.
'gets tired note about' is the wordplay.
'gets tired' becomes 'flags'.
'about' indicates anagramming the letters.
'note' is an anagram of 'tone'.
'flags'+'tone'='FLAGSTONE'
(Other definitions for flagstone that I've seen before include "One walked on" , "Pavior made from Teflon gas" , "It'll lay (some say) at ground level" , "Fine-textured rock" , "Paving-slab" .)