Restrained, crazy, getting clean away (8)
I believe the answer is:
manacled
'restrained' is the definition.
The answer and definition can be both to do with contact as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?
'crazy getting clean away' is the wordplay.
'crazy' becomes 'mad' (synonyms).
'getting' is an insertion indicator.
'away' is an anagram indicator (letters move away from their original places).
'clean' with letters rearranged gives 'nacle'.
'mad' enclosing 'nacle' is 'MANACLED'.
Can you help me to learn more?
(Another definition for manacled that I've seen is " Shackled".)