Heidegger here and there showing bite (4)
I believe the answer is:
edge
'bite' is the definition.
(I've seen this in another clue)
'heidegger here and there' is the wordplay.
'here and there' means one should take alternating letters (here and then can mean regularly).
The alternate letters of 'heidegger' are 'EDGE'.
'showing' acts as a link.
(Other definitions for edge that I've seen before include "Margin, fringe" , "incisiveness" , "Force" , "Inch; border" , "Sidle, lip" .)