Child in punk ideology (3)
I believe the answer is:
kid
'child' is the definition.
(I know that child can be written as kid)
'in punk ideology' is the wordplay.
'in' indicates a hidden word.
'KID' is hidden in the letters of 'punk ideology'.
(Other definitions for kid that I've seen before include "To fool; young animal" , "Sort of gloves" , "little one" , "Playfully deceive" , "Young animal or child" .)