Kicking GTI, one's in a rage (6)
I believe the answer is:
toeing
'kicking' is the definition.
The definition and answer can be both to do with contact as well as being present participle verbs.
Maybe they are linked in a way I don't understand?
'gti one's in a rage' is the wordplay.
'in a rage' indicates anagramming the letters (disturbed or raging version of the letters).
'gti'+'one'='gtione'
'gtione' is an anagram of 'TOEING'.
Can you help me to learn more?
(Other definitions for toeing that I've seen before include "... the line, keeping the rules" , "on the line -- or standing by?" , "..... the line is conforming obediently" .)