A heartless old F1 driver, father of many (7)
I believe the answer is:
abraham
'father of many' is the definition.
(Abraham has many sons in the Bible)
'a heartless old f1 driver' is the wordplay.
'heartless' suggests removing the centre.
'old f1 driver' becomes 'Brabham' (F1 driver Jack Brabham, 1926-2014).
'brabham' with its centre taken out is 'braham'.
'a'+'braham'='ABRAHAM'
(Other definitions for abraham that I've seen before include "E.g. Lincoln" , "Lincoln, perhaps" , "Founder of the Hebrew people" , "First patriarch and ancestor of the Hebrews" , "Father of all the Jews (7)" .)