One may help one escape from a trap (4,5)
I believe the answer is:
sand wedge
'escape from a trap' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
'one may help one' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'an' (I've seen this in other clues) and 'an' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for sand wedge that I've seen is " Golf club".)