Dishevelled, given tie in case (8)
I believe the answer is:
genitive
'case' is the definition.
(I've seen this before)
'dishevelled given tie' is the wordplay.
'dishevelled' indicates an anagram.
'given'+'tie'='giventie'
'giventie' with letters rearranged gives 'GENITIVE'.
'in' is the link.
(Other definitions for genitive that I've seen before include "(In grammar) the possessive case" , "This case shows possession" .)