Crossword Genius

Less than a clear idea of what the desert's like? (4)

Ross

I believe the answer is:

arid

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

'what the desert's like?' is the definition.
I can't tell whether this defines the answer.

'less than a clear idea' is the wordplay.
'less' indicates a hidden word (the clue less some of the letters in it).
'ARID' is hidden within 'than clear idea'.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for arid that I've seen before include "Very dry, having little rain" , "Dry and parched, as with regions" , "(Of land) very dry" , "(Of an area) very dry" , "Wadi may be this" .)

I've seen this clue in the Evening Standard.
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