Someone with book perhaps following close to street walker (7)
I believe the answer is:
treader
'walker' is the definition.
(I've seen this in another clue)
'someone with book perhaps following close to street' is the wordplay.
I cannot really see how this works, but
'someone' could be 'reader' (reader is a kind of someone) and 'reader' is found in the answer.
A single letter 't' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for treader that I've seen before include "Plodder" , "who goes one step at a time" .)