Do nothing for stricken region (6)
I believe the answer is:
ignore
'do nothing for' is the definition.
(to do nothing for something is to ignore it)
'stricken region' is the wordplay.
'stricken' indicates anagramming the letters.
'region' anagrammed gives 'IGNORE'.
(Other definitions for ignore that I've seen before include "Walk away from" , "Disregard - cut" , "Deliberately take no notice" , "Fail to consider" , "Send to Coventry" .)