My coarse broadcast shows tree (8)
I believe the answer is:
sycamore
'tree' is the definition.
(I know that Sycamore is a type of tree)
'my coarse broadcast' is the wordplay.
'broadcast' is an anagram indicator (letters scattered or cast around).
'my'+'coarse'='mycoarse'
'mycoarse' with letters rearranged gives 'SYCAMORE'.
'shows' is the link.
(Other definitions for sycamore that I've seen before include "Tree - so creamy (anag)" , "Tree with winged seeds" , "Tree producing propeller-shaped seeds" , "Large maple" , "Deciduous tree" .)