Like sundry sunless days? (3)

I believe the answer is:

dry

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

'like' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I can't see?

'sundry sunless days?' is the wordplay.
'DRY' is hidden in amongst the letters.
But, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for dry that I've seen before include "Uninteresting" , "Sere" , "off the wagon" , "Arid as some wine may be" , "Without moisture" .)

I've seen this clue in the Evening Standard.

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