Traffic system upset club visiting outskirts of Grimsby (8)
I believe the answer is:
gyratory
'traffic system' is the definition.
(I've seen this before)
'upset club visiting outskirts of grimsby' is the wordplay.
'upset' is a reversal indicator.
'club' becomes 'rotary' (Rotary Club is an example**).
'visiting' indicates putting letters inside.
'outskirts of' means to remove the middle letters.
'grimsby' with its middle taken out is 'gy'.
'rotary' in reverse letter order is 'yrator'.
'yrator' going inside 'gy' is 'GYRATORY'.
(Other definitions for gyratory that I've seen before include "going round in circles" , "traffic system" .)