Landlord collects mail and printed matter (11)
I believe the answer is:
letterpress
'printed matter' is the definition.
(thesaurus)
'landlord collects mail' is the wordplay.
'landlord' becomes 'letter' (landlords let property).
'collects mail' becomes 'press' (I can't explain this - if you can you should give a lot more credence to this answer).
'letter'+'press'='LETTERPRESS'
'and' is the link.
Can you help me to learn more?
(Other definitions for letterpress that I've seen before include "reading matter" , "Printing technique" , "Text, not illustrations; printing from raised type" .)