Watch over across the waters, it is said (7)
I believe the answer is:
oversee
'the waters it is said' is the definition.
I can't tell whether this defines the answer.
'watch over across' is the wordplay.
'watch' becomes 'see' (synonyms).
'across' says to put letters next to each other (across can mean on).
'see' after 'over' is 'OVERSEE'.
Can you help me to learn more?
(Other definitions for oversee that I've seen before include "Be responsible for" , "Exercise supervision" , "Keep a check on" , "Superintend, manage" , "guide" .)