Navigator loves Puccini, to an extent (8)
I believe the answer is:
vespucci
'navigator' is the definition.
'loves puccini to an extent' is the wordplay.
'to an extent' indicates the answer is hidden within the clue.
'VESPUCCI' is hidden within 'loves puccini'.
(Other definitions for vespucci that I've seen before include "America is called after the Florentine navigator" , "America was named after this explorer" , "Amerigo -, fifteenth to sixteenth century explorer" , "Amerigo - - , Florentine explorer" , "Amerigo ___, navigator after whom America was named?" .)