Diminish as a result of docking? (4,3)
I believe the answer is:
tail off
'diminish' is the definition.
(thesaurus)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for tail off that I've seen before include "Gradually diminish" , "Decline gradually" , "Decline, gradual reduction" , "Gradually reduce" , "Become gradually less" .)