Now, the jellied eel is for her (5)
I believe the answer is:
adele
'for her' is the definition.
'now the jellied eel' is the wordplay.
'now' becomes 'AD' (AD, Anno Domini, as opposed to BC, Before Christ).
'the jellied' is an anagram indicator (I've seen this in other clues).
'eel' anagrammed gives 'ele'.
'ad'+'ele'='ADELE'
'is' acts as a link.
(Other definitions for adele that I've seen before include "Woman" , "Popular female singer" , "Performer" , "girl" , "Singer with albums titled 19, 21 and 25" .)