Start reading the morning paper (4)
I believe the answer is:
ream
'paper' is the definition.
(I've seen this before)
'start reading the morning' is the wordplay.
'start reading' becomes 're' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'the morning' becomes 'am'.
're'+'am'='REAM'
Can you help me to learn more?
(Other definitions for ream that I've seen before include "Widen (hole); quantity of paper" , "20 quires of paper" , "Lots of paper" , "516 sheets of paper" , "Many sheets - enlarge hole" .)