Umbelliferous plant of Pope and Pushkin, say (10)
I believe the answer is:
alexanders
'umbelliferous plant' is the definition.
'Alexanders' can be an answer for 'plant' (Alexanders is an example). I am not sure about the 'umbelliferous' bit.
'pope and pushkin say' is the wordplay.
'pope' becomes 'alexander' (I've seen this before).
'and' says to put letters next to each other.
'pushkin say' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'alexander'+'s'='ALEXANDERS'
'of' is the link.
Can you help me to learn more?
(Other definitions for alexanders that I've seen before include "associated with ragtime band?" , "salad used to include this" , "King's" , "Plant" .)