Diving apparatus soon empty round river with a lot of kelp (7)
I believe the answer is:
snorkel
'diving apparatus' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'soon empty round river with a lot of kelp' is the wordplay.
'empty' means to remove the middle letters.
'round' becomes 'o' (o is a circular letter).
'river' becomes 'r' (abbreviation).
'with' says to put letters next to each other.
'a lot of' means to remove the last letter (most of the word but not all of it).
'soon' with its middle removed is 'sn'.
'kelp' with its final letter taken off is 'kel'.
'sn'+'o'+'r'+'kel'='SNORKEL'
Can you help me to learn more?
(Other definitions for snorkel that I've seen before include "Breathing tube for under-water swimmer" , "Surface swimmer's breathing aid" , "Breathing device for swimmers" , "Tube supplying air to swimmer" , "diving equipment?" .)