Globe I mentioned before dance (7)
I believe the answer is:
eyeball
'dance' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'globe i mentioned before' is the wordplay.
'globe' becomes 'ball' (synonyms).
'mentioned' shows a homophone (sound like).
'before' means one lot of letters go next to another.
'i' is a homophone of 'eye'.
'ball' after 'eye' is 'EYEBALL'.
Can you help me to learn more?
(Other definitions for eyeball that I've seen before include "making us stare" , "Optic organ" , "pupil found here" , "Socket filler" , "Label ye (anag)" .)