More colourful bird takes over tree (8)
I believe the answer is:
flashier
'more colourful' is the definition.
Both the definition and answer are comparative adjectives. Maybe they are linked in a way I don't understand?
'bird takes over tree' is the wordplay.
'bird takes' becomes 'flier' (I am not sure about this - if you are sure you should believe this answer much more).
'over' is an insertion indicator.
'tree' becomes 'ash tree' (ash is a kind of tree).
'flier' going around 'ash' is 'FLASHIER'.
Can you help me to learn more?
(Other definitions for flashier that I've seen before include "more dazzling display" , "with more ostentation" , "Showing more bravado" .)