Take no notice of gun dog, oddly, in anger (6)
I believe the answer is:
ignore
'take no notice of' is the definition.
(to take no notice of something is to ignore it)
'gun dog oddly in anger' is the wordplay.
'oddly' indicates alternate letters (letters in odd-numbered positions).
'in' means one lot of letters goes inside another.
'anger' becomes 'ire' (ire is intense rage).
'gun'+'dog'='gundog'
The alternate letters of 'gundog' are 'gno'.
'gno' put into 'ire' is 'IGNORE'.
(Other definitions for ignore that I've seen before include "Send to Coventry" , "'Disregard, overlook (6)'" , "Discount" , "Slight" , "Region in which to snub" .)