First Victorian Prince Consort familiarly (6)
I believe the answer is:
primal
'first' is the definition.
(thesaurus)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for primal that I've seen before include "Original; chief" , "Primitive or fundamental" , "Original - basic" , "Original, fundamental" , "typifying some fear?" .)