Fruit poet sent over is a dull colour (9)

'a dull colour' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'fruit poet sent over' is the wordplay.
'fruit' becomes 'olive' (I've seen this before).
'poet' becomes 'bard' (bard is a kind of poet).
'sent over' is a reversal indicator.
'bard' reversed gives 'drab'.
'olive'+'drab'='OLIVEDRAB'

'is' acts as a link.

Can you help me to learn more?