To father (4)
'to father' is the definition.
(synonyms)
This is all the clue.
(Other definitions for beget that I've seen before include "Sire" , "Engender" , "Bring about, cause" , "Produce (child) (archaic)" , "Give rise to; create (children)" .)
'to father' is the definition.
('sire' can be a synonym of 'father')
This is the entire clue.
(Other definitions for sire that I've seen before include "Stallion; beget" , "Male parent of a horse, for example" , "Foal's father" , "Old form of address to king - rise to it" , "Male parent of, say, horse" .)