Lessens
'lessens' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ebbs that I've seen before include "Declines gradually" , "Subsides" , "Flows back - declines" , "fades away" , "Wanes" .)
'lessens' is the definition.
(abating is a kind of lessening)
This is the entire clue.
(Other definitions for abates that I've seen before include "Makes less intense" , "Slacks off" , "lowers" , "'Lets up, dies away (6)'" , "Becomes less intense" .)
'lessens' is the definition.
(reducing is a kind of lessening)
This is the entire clue.
(Other definitions for reduces that I've seen before include "Secured (anag.)" , "Takes off, weight say" , "Lowers" , "Makes smaller or lower" , "contracts" .)