One of those in the Mallow family removing plantain from national park (4)
I believe the answer is:
okra
'one of those in the mallow family' is the definition.
I can't judge whether this defines the answer.
'removing plantain from national park' is the wordplay.
'removing' indicates anagramming the letters (moving the letters again).
'from' indicates named letters should be taken away.
'national'+'park'='nationalpark'
'nationalpark' with 'plantain' taken out is 'oark'.
'oark' anagrammed gives 'OKRA'.
Can you help me to learn more?
(Other definitions for okra that I've seen before include "Ladies' fingers with edible pods" , "Long green tropical vegetable" , "old ladies' fingers" , "Lady's fingers; gumbo; bhindi" , "Pod eaten in soups, stews etc" .)