Got slacker to admit toilets need fixing (8)
I believe the answer is:
loosened
'got slacker' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Perhaps you can see a link between them that I don't see?
'admit toilets need fixing' is the wordplay.
'admit' indicates putting letters inside.
'toilets' becomes 'loos' (loo can informally mean a toilet).
'fixing' is an anagram indicator.
'need' is an anagram of 'ened'.
'loos' going into 'ened' is 'LOOSENED'.
'to' is the link.
Can you help me to learn more?
(Another definition for loosened that I've seen is " Made slack, eased as with grip".)