Shapes I'm busting to get attention (8)
I believe the answer is:
emphasis
'attention' is the definition.
(thesaurus)
'shapes i'm busting' is the wordplay.
'busting' indicates anagramming the letters (I've seen 'busted' mean this).
'shapes'+'im'='shapesim'
'shapesim' is an anagram of 'EMPHASIS'.
'to get' acts as a link.
(Other definitions for emphasis that I've seen before include "Weight" , "Force" , "Stress or significance" , "Special importance or prominence given to something" , "Stress - misshape (anag)" .)