try quick shifting up, the citroen ax i drove after passing my test was a bastard for wheelspin in the wet (i guess cos it weighed f*ck all no weight to hold em down) i used to just keep changing up till it went, can always ease off a bit. the MR2 Turbo used to spin the wheels up in the wet if you was in 3rd gear at about 40-50mph if the turbo spooled up hehe