Consider a possibly dusty answer (5)

I believe the answer is:

study

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

'consider' is the definition.
(I know that consider can be written as study)

'a possibly dusty answer' is the wordplay.
'dusty' anagrams to 'STUDY'.
But, I'm not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for study that I've seen before include "Contemplate" , "See 11" , "Analysis" , "Read: den" , "Office at home" .)

I've seen this clue in the Evening Standard.

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