Lock spring breaks to give uninvited access (8)
I believe the answer is:
trespass
'uninvited access' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'lock spring breaks' is the wordplay.
'lock' becomes 'tress' (both can mean a piece of hair).
'spring' becomes 'spa' (spa can mean a mineral spring).
'breaks' means one lot of letters goes inside another (inserted letters break into the word).
'tress' enclosing 'spa' is 'TRESPASS'.
'to give' is the link.
Can you help me to learn more?
(Other definitions for trespass that I've seen before include "Wrongfully enter another's land" , "Entry without permission" , "Transgress" , "Enter someone's property unlawfully" , "Go where one shouldn't" .)