Garden visitor meeting female displays muscle (4)
I believe the answer is:
beef
'muscle' is the definition.
(I've seen this before)
'garden visitor meeting female' is the wordplay.
'garden visitor' becomes 'bee' (bees visit flowers).
'meeting' says to put letters next to each other.
'female' becomes 'f' (common abbreviation).
'bee'+'f'='BEEF'
'displays' is the link.
(Other definitions for beef that I've seen before include "Meat - complaint" , "Strength - grievance" , "Complaint; muscle" , "Brawn; grumble" , "Meat of the cow" .)