Don't go and wander off — not right (4)
I believe the answer is:
stay
'don't go' is the definition.
(I've seen this before)
'wander off not right' is the wordplay.
'wander off' becomes 'stray' (I've seen this before).
'not' indicates named letters should be taken away.
'right' becomes 'r' (common abbreviation).
'stray' with 'r' taken out is 'STAY'.
'and' acts as a link.
(Other definitions for stay that I've seen before include "Remain; steady" , "hang about" , "Supporter" , "Remain; corset part" , "Rope bracing a mast etc" .)