Shame one of The Stones joins Yes (4)
I believe the answer is:
pity
'shame' is the definition.
('pity' can be a synonym of 'shame')
'one of the stones joins yes' is the wordplay.
'one of the stones' becomes 'pit' (I've seen this in other clues).
'joins' means one lot of letters go next to another.
'yes' becomes 'y'.
'pit'+'y'='PITY'
(Other definitions for pity that I've seen before include "true compassion?" , "Feel sorry for" , "Sympathy for the suffering of another" , "Cause for regret" , "Sympathise with" .)