Fiddle around edges, flushed (7)
I believe the answer is:
crimson
'flushed' is the definition.
(I've seen this before)
'fiddle around edges' is the wordplay.
'fiddle' becomes 'con'.
'around' indicates putting letters inside.
'edges' becomes 'rims' (rim is a kind of edge).
'con' going around 'rims' is 'CRIMSON'.
(Other definitions for crimson that I've seen before include "Vivid red" , "Rich deep red" , "Flushed" , "Blood-red" , "Flush" .)