Inmates out over the weekend get the wrong end of the stick (8)
I believe the answer is:
mistaken
'the wrong end of the stick' is the definition.
I can't tell whether this definition defines the answer.
'inmates out over the weekend' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'over' means one lot of letters goes inside another.
'the weekend' becomes 'k' (I've seen this in other clues).
'inmates' anagrammed gives 'mistaen'.
'mistaen' going around 'k' is 'MISTAKEN'.
'get' acts as a link.
Can you help me to learn more?
(Other definitions for mistaken that I've seen before include "Wrong (in judgement)" , "Wrong in opinion, judgment etc." , "Erroneous" , "'Wrong, misguided (8)'" , "Wrong, incorrect" .)