Bird to measure plant (10)

'plant' is the definition.
(cuckoopint is a kind of plant)

'bird to measure' is the wordplay.
I cannot really see how this works, but
'bird' could be 'cuckoo' (cuckoo is a kind of bird) and 'cuckoo' is found in the answer.
'measure' could be 'pint' (pint is a kind of measure) and 'pint' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

Can you help me to learn more?