Mother turning head in rage (7)
I believe the answer is:
madness
'rage' is the definition.
('madness' can be a synonym of 'rage')
'mother turning head' is the wordplay.
'mother' becomes 'dam' (female parent of an animal).
'turning' is a reversal indicator.
'head' becomes 'ness' (ness is a headland).
'dam' reversed gives 'mad'.
'mad'+'ness'='MADNESS'
'in' is the link.
(Other definitions for madness that I've seen before include "Absurdity" , "Insanity" , "Dementia" , "Utter foolishness" , "Group" .)