Crossword Genius

Lacking proper justification for being mad (7,4,6)

Ross

I believe the answer is:

without good reason

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

'being mad' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'lacking proper justification' is the wordplay.
I cannot really understand how this works, but
'lacking' could be 'without' (I've seen this before) and 'without' is present in the answer.
'justification' could be 'goodreason' (I've seen this in another clue) and 'goodreason' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

'for' acts as a link.

Can you help me to learn more?

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app