Errant wives taking a left turn! (6)
I believe the answer is:
swivel
'turn' is the definition.
(swiveling is a kind of turning)
'errant wives taking a left' is the wordplay.
'errant' is an anagram indicator (I've seen this in other clues).
'taking' is a charade indicator (letters next to each other).
'a left' becomes 'l' (common abbreviation).
'wives' is an anagram of 'swive'.
'swive'+'l'='SWIVEL'
(Other definitions for swivel that I've seen before include "Spin on the spot" , "Turn as if on a pivot, like a kind of chair" , "Turn on the spot" , "Revolve" , "Revolving coupling" .)