Length of a coffee table? (4)
I believe the answer is:
feet
'length' is the definition.
Although both the answer and definition are nouns, they are not in the same form of the noun.
'of a coffee table?' is the wordplay.
'of' indicates the answer is hidden within the clue.
'FEET' is hidden within 'a coffee table'.
Can you help me to learn more?
(Other definitions for feet that I've seen before include "supporters?" , "Linear Units of a third of a yard" , "Metrical units" , "Have both on the ground to be practical" , "Old measures - that fill shoes" .)