Was tender shark served with chard finally? (6)
I believe the answer is:
nursed
'was tender' is the definition.
(tend can mean to nurse)
'shark served with chard finally?' is the wordplay.
'shark' becomes 'nurse' (nurse shark is a type of shark).
'served with' is a charade indicator (letters next to each other).
'finally?' says to take the final letters (I've seen 'finally' mean this).
The last letter of 'chard' is 'd'.
'nurse'+'d'='NURSED'
(Other definitions for nursed that I've seen before include "Cared for a patient" , "Cared for the ill" , "26dn the ill" , "Sunder (anag)" , "Tended to while ill" .)