Plant may crush them in order to protect name (13)
I believe the answer is:
chrysanthemum
'plant' is the definition.
The answer is an example.
'may crush them in order to protect name' is the wordplay.
'in order' indicates an anagram (the letters in a new order).
'to protect' means one lot of letters goes inside another.
'name' becomes 'n' (common abbreviation e.g. on forms).
'may'+'crush'+'them'='maycrushthem'
'maycrushthem' is an anagram of 'chrysathemum'.
'chrysathemum' placed around 'n' is 'CHRYSANTHEMUM'.
(Other definitions for chrysanthemum that I've seen before include "Large, golden, daisy plant" , "Common garden plant" , "Perennial" , "Ornamental flower" , "Genus of flowering plants related to the daisy family" .)