Colour of a lovebird flying around (5,4)
I believe the answer is:
olive drab
'colour' is the definition.
(I have seen 'Dull colour' mean 'olive drab' so perhaps 'colour' could also mean 'olive drab')
'a lovebird flying around' is the wordplay.
'flying around' indicates anagramming the letters.
'a'+'lovebird'='alovebird'
'alovebird' anagrammed gives 'OLIVE-DRAB'.
'of' is the link.
(Other definitions for olive drab that I've seen before include "Dull colour" , "Soldiers' uniform" , "Military uniform colour" , "Greyish" , "Colour of some military uniforms" .)