Reheat stew for a loved one (10)

I believe the answer is:

sweetheart

I'm a little stuck... Click here to teach me more about this clue!

'a loved one' is the definition.
(I've seen this before)

'reheat stew' is the wordplay.
'reheat stew' can be anagrammed to 'SWEETHEART'.
Though, I am unsure how this is indicated.

'for' is the link.

Can you help me to learn more?

(Other definitions for sweetheart that I've seen before include "Lover" , "baby" , "Dear" , "Juliet had one" , "Darling" .)

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