Therapist with patter -- it offers protection (6-4)
I believe the answer is:
shrink wrap
'offers protection' is the definition.
'therapist with patter it' is the wordplay.
I cannot quite see how this works, but
'therapist' could be 'shrink' and 'shrink' is found in the answer.
'with' could be 'w' (abbreviation) and 'w' is located in the answer.
The remaining letters 'rap' is a valid word 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 shrink wrap that I've seen before include "transparent stuff" , "seal" , "Tightly package in flexible plastic" .)