Fashionista Geraldine shows leg (5)
I believe the answer is:
stage
'leg' is the definition.
(I know that leg can be written as stage)
'fashionista geraldine shows' is the wordplay.
'shows' indicates a hidden word.
'STAGE' is hidden in the letters of 'fashionista geraldine'.
(Other definitions for stage that I've seen before include "Section (of journey)" , "Gates (anag.)" , "Phase - platform" , "Acting area" , "The boards" .)