Visualise a Gemini getting ruffled? (7)
I believe the answer is:
imagine
'visualise' is the definition.
(I've seen this in another clue)
'a gemini getting ruffled?' is the wordplay.
'getting' is a charade indicator (letters next to each other).
'ruffled?' indicates anagramming the letters.
'a'+'gemini'='agemini'
'agemini' anagrammed gives 'IMAGINE'.
(Other definitions for imagine that I've seen before include "Picture mentally" , "Suspect" , "John Lennon classic (just think of it!)" , "Assume" , "Number one" .)