Dropped off where sleepers are grabbing a rest at last (6)
I believe the answer is:
abated
'dropped off' is the definition.
(I've seen this before)
'sleepers are grabbing a rest at last' is the wordplay.
'sleepers are' becomes 'abed' (I can't justify this - if you can you should give a lot more credence to this answer).
'grabbing' is an insertion indicator.
'at last' says to take the final letters.
The last letter of 'rest' is 't'.
'a'+'t'='at'
'abed' going around 'at' is 'ABATED'.
'where' acts as a link.
Can you help me to learn more?
(Other definitions for abated that I've seen before include "grew smaller" , "Eased" , "Went down or became less, like storm" , "Calmed like storm" , "Became less strong or severe" .)