Keep out of central Tooting, for instance (4)
I believe the answer is:
stay
'keep' is the definition.
(thesaurus)
'out of central tooting for instance' is the wordplay.
'out of' means one lot of letters goes inside another.
'central' says to take the centre.
'for instance' becomes 'say'.
The central letter of 'tooting' is 't'.
't' put inside 'say' is 'STAY'.
(Other definitions for stay that I've seen before include "Wait" , "remain in the same place" , "Stanchion" , "Guy rope" , "Supporter" .)