Daughter put out, which will make them sad (6)

I believe the answer is:

deject

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

'will make them sad' is the definition.
I can't tell whether this definition defines the answer.

'daughter put out' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'put out' becomes 'eject' (I've seen this before).
'd'+'eject'='DEJECT'

'which' acts as a link.

Can you help me to learn more?

(Other definitions for deject that I've seen before include "Discourage" , "Depress" , "Make dispirited" .)

I've seen this clue in The Irish Times.

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