Clarke makes two changes - one enforcedJAMES Morrison earns an instant recall to the Baggies’ starting XI after missing last weekend’s trip to West Ham with a hamstring problem.
The Scotland midfielder comes in for Youssouf Mulumbu, who serves the first game of his three-match ban for his Upton Park red card.
Jerome Thomas is also back in the team in place of Romelu Lukaku, who drops to the bench as Steve Clarke switches to a 4-2-3-1 formation.
Peter Odemwingie misses out altogether, with youngster Isaiah Brown on the bench for only the second time.
Steven Reid sits out his fourth successive game due to a groin problem.
Arsene Wenger names an unchanged side to the one that beat Reading 4-1 last weekend.
ALBION (4-2-3-1): Foster; Jones, McAuley, Olsson, Ridgewell; Yacob, Brunt; Dorrans, Morrison, Thomas; Long. Subs: Myhill (gk), Lukaku, Popov, Brown, Rosenberg, Fortune, Tamas.
ARSENAL (4-3-3): Fabianski; Sagna, Mertesacker, Koscielny, Monreal; Arteta, Rosicky, Ramsey; Gervinho, Cazorla, Giroud. Subs: Mannone (gk), Vermaelen, Jenkinson, Gibbs, Coquelin, Oxlade-Chamberlain, Podolski.
REFEREE: H Webb (Yorkshire).