Waterman's line? (3)
I believe the answer is:
row
This clue could be a double definition.
'waterman's' is the first definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'line?' is the second definition.
(a row or line of things)
Can you help me to learn more?
(Other definitions for row that I've seen before include "Falling-out" , "Use an oar" , "bank?" , "Propel boat manually" , "Din; line" .)