Passage remains presented in speech, offering protection for viewer (7)
I believe the answer is:
eyelash
'passage remains presented in speech' is the definition.
I can't judge whether this defines the answer.
'protection for viewer' is the wordplay.
'protection' becomes 'lash' (I can't explain this - if you can you should give a lot more credence to this answer).
'for' means one lot of letters go next to another (I've seen this in other clues).
'viewer' becomes 'eye' (organ which sees or views).
'lash' put after 'eye' is 'EYELASH'.
'offering' is the link.
Can you help me to learn more?
(Other definitions for eyelash that I've seen before include "Short curved hair" , "Hair; cilium (anatomy)" , "Facial hair, cilium" , "Short facial hair" , "Hair by eye" .)