Spots 1,000 boats (5)
I believe the answer is:
marks
This clue might be a double definition.
'spots' is the first definition.
The definition and answer can be both acts as well as being plural nouns.
Maybe they are linked in a way I don't understand?
'1000 boats' is the second definition.
(I've seen this in another clue)
Can you help me to learn more?
(Other definitions for marks that I've seen before include "points" , "Visible signs" , "Symbols" , "Former German currency" , "Goals" .)