Number in yours truly's street (2,3)
I believe the answer is:
my way
'number' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'yours truly's street' is the wordplay.
'yours truly's' becomes 'my' (belonging to the person writing or speaking).
'street' becomes 'way' (I've seen this before).
'my'+'way'='MY WAY'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for my way that I've seen before include "Sinatra song" , "Frank Sinatra hit" .)