Steal the heart of an acrobat (3)
I believe the answer is:
rob
'steal' is the definition.
(I know that rob is a type of steal)
'heart of an acrobat' is the wordplay.
'heart of' indicates a hidden word.
'ROB' is hidden in the letters of 'acrobat'.
'the' is the link.
(Other definitions for rob that I've seen before include "boy's name" , "Nick" , "Hold up" , "sack" , "Burgle" .)