Site of a battle in Basel — a lame insurrection (2,7)
I believe the answer is:
el alamein
'site of a battle' is the definition.
(Egyptian site of two WW2 battles)
'in basel a lame insurrection' is the wordplay.
'in' says the answer is hidden in the clue.
'EL ALAMEIN' can be found hidden inside 'basel a lame insurrection'.
(Other definitions for el alamein that I've seen before include "WWII battle" , "victory" , "Place in Egypt where Montgomery defeated Rommel" , "North African WW2 battle site" , "North African World War two battle" .)