Drying agent tails off excessively? (5)
I believe the answer is:
towel
'drying agent' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for towel that I've seen before include "Drier" , "Bathroom cloth" , "Dryer" , "Piece of absorbent cloth or paper for drying" , "Bathroom item" .)