Some of the scuba gear in portmanteau (3)
I believe the answer is:
bag
'portmanteau' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'some of the scuba gear in' is the wordplay.
'some of' indicates the answer is hidden within the clue.
'BAG' is hidden in the letters of 'scuba gear in'.
Can you help me to learn more?
(Other definitions for bag that I've seen before include "Reserve (colloq.)" , "Container for holding or carrying" , "Container for carrying thing" , "Pouch" , "Claim" .)