Virginia is upset when detained by Adam's mate being equivocal (7)
I believe the answer is:
evasive
'equivocal' is the definition.
(similar in meaning)
'virginia is upset when detained by adam's mate' is the wordplay.
'virginia' becomes 'va' (US state abbreviation).
'upset' indicates anagramming the letters.
'when detained by' means one lot of letters goes inside another.
'adam's mate' becomes 'eve' (I've seen this in another clue).
'is' is an anagram of 'si'.
'va'+'si'='vasi'
'vasi' placed into 'eve' is 'EVASIVE'.
'being' is the link.
(Other definitions for evasive that I've seen before include "Uncommitted" , "make out-of-the-way sort of action" , "Avoiding self-revelation" , "Dissembling" , "Quibbling" .)