Reckoned on reporting caller (5)
I believe the answer is:
guest
'caller' is the definition.
(someone making a visit or call)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for guest that I've seen before include "Caller" , "Conjectured audibly" , "Invited person" , "Customer of a hotel" , "One receiving hospitality" .)