Of the heart chambers (6)
I believe the answer is:
atrial
(Other definitions for atrial that I've seen before include "Like some courts" , "Lariat (anag)" , "of the heart cavities" , "Like main court" , "referring to Chambers?" .)
I believe the answer is:
atrial
(Other definitions for atrial that I've seen before include "Like some courts" , "Lariat (anag)" , "of the heart cavities" , "Like main court" , "referring to Chambers?" .)