There was one for starters - and now another? (3)
I believe the answer is:
two
'now another?' is the definition.
I can't tell whether this defines the answer.
'there was one for starters' is the wordplay.
'for starters' says to take the initial letters.
The first letters of 'there was one' is 'TWO'.
'and' is the link.
(Other definitions for two that I've seen before include "One plus one" , "eg Twins" , "Old song 'Tea for . . .'" , "Number in pair" , "II" .)