It helps one to do a bolt (7)
I believe the answer is:
spanner
'a bolt' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'it helps one to do' is the wordplay.
I cannot quite understand how this works, but
'it' could be 'e' ('e' can mean 'electronic' which is similar to 'IT') and 'e' is located in the answer.
'one' could be 'an' (an apple is one apple) and 'an' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for spanner that I've seen before include "Nut tightener" , "Nut-turning tool" , "Tool, often adjustable" , "In the works, this tool is a headache" , "Mechanic's agent" .)