Water getting out of the lake (4)
I believe the answer is:
leak
'water' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'out of the lake' is the wordplay.
'out of' is an anagram indicator.
'lake' with letters rearranged gives 'LEAK'.
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for leak that I've seen before include "Unauthorised disclosure of confidential information" , "Unwanted discharge" , "Disclose unauthorised information" , "Seep; disclose" , "Escape - make (confidential information) known" .)