Reportedly notices geographical features (4)
I believe the answer is:
seas
'geographical features' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.
'reportedly notices' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'notices' becomes 'sees' (to notice is to observe or see).
'sees' is a homophone of 'SEAS'.
Can you help me to learn more?
(Other definitions for seas that I've seen before include "Bodies of salt water" , "Aegean and Mediterranean, say" , "Red and Black are" , "Red and Dead" , "Oceans" .)