Crossword Genius

This the last spoon? (6)

Ross

I believe the answer is:

wooden

'last spoon?' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

I don't understand how the remainder of the clue works.

(Other definitions for wooden that I've seen before include "Emotionless" , "E.g. made of oak" , "(Of acting) unnaturally stiff" , "acting badly" , "Unconvincing (of a stage performance) - made of oak?" .)

I've seen this clue in The Guardian.
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