Sharp turn that secures locks (7)
I believe the answer is:
hairpin
'sharp turn that secures locks' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
I also know that 'locks' relates to this answer.
'locks' is the wordplay.
I cannot quite see how this works, but
'locks' could be 'hair' (I've seen this in another clue) and 'hair' is found within the answer.
The remaining letters 'pin' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for hairpin that I've seen before include "associated with locks" , "Lock-keeper" , "Sharp type of bend" , "Fastener for tresses" , "stuck in a lock?" .)