Crossword Genius

Without any land for no good reason? (12)

Ross

I believe the answer is:

groundlessly

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

'without any land for no good reason?' is the definition.
I can't tell whether this defines the answer.

'without any land for no good' is the wordplay.
'without any land' becomes 'groundless' ('land' can be 'ground' (synonyms) so maybe 'without any land' can be ''groundless').
'for' is a charade indicator (letters next to each other).
'no good' becomes 'ly' (I can't justify this - if you can you should give a lot more credence to this answer).
'groundless'+'ly'='GROUNDLESSLY'

Can you help me to learn more?

I've seen this clue in The Irish Independent.
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