Shock as fishcakes initially run out (4)
I believe the answer is:
afro
'shock' is the definition.
(shock can mean a mass of hair)
'as fishcakes initially run out' is the wordplay.
'initially' indicates taking the first letters.
'run out' becomes 'RO' (cricket abbreviation).
The initial letters of 'as fishcakes' is 'af'.
'af'+'ro'='AFRO'
(Other definitions for afro that I've seen before include "Styling done to hair" , "Of hair style, tightly curled and bushy" , "Tightly-curled 4 down" , "Style of haircut" , "Hairdo of the 1960s and 70s" .)