Being more droll, prefers martini like this? (5-3)

I believe the answer is:

extra-dry

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'prefers martini like this?' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'being more droll' is the wordplay.
'being more' becomes 'extra' (I've seen this in other clues).
'droll' becomes 'dry' (I can't justify this - if you can you should believe this answer much more).
'extra'+'dry'='EXTRA-DRY'

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I've seen this clue in The Irish Times.

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