Kind man respected drained lake (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
gentle
(Other definitions for gentle that I've seen before include "Not harsh or violent" , "that may help angler catch fish" , "'Do not go . . . . . . into that good night' (Dylan Thomas)" , "Kind - maggot" , "Mild and considerate" .)