Dal is missing in identical preparation of egg (6)
I believe the answer is:
incite
'egg' is the definition.
(I've seen this before)
'dal is missing in identical preparation' is the wordplay.
'is missing in' is a deletion indicator.
'preparation' is an anagram indicator.
'identical' with 'dal' removed is 'ientic'.
'ientic' anagrammed gives 'INCITE'.
'of' is the link.
(Other definitions for incite that I've seen before include "Whip up" , "Urge, instigate" , "Provoke, set off" , "Stir up (eg, violence)" , "Urge (to violence)" .)