First sign (7)
I believe the answer is:
I believe this is a double definition.
'first' is the first definition.
('initial' can be similar in meaning to 'first')
'sign' is the second definition.
(initial is a kind of sign)
(Other definitions for initial that I've seen before include "Sign" , "Let; rent" , "First home, corgi, ultimately, wagging tail" , "Name's first letter" , "First letter of a name" .)