Take to arms! (7)
I believe the answer is:
embrace
This might be a double definition.
'take' is the first definition.
(thesaurus)
'arms' is the second definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for embrace that I've seen before include "Hug or accept eagerly" , "Hug; adopt" , "Include (in one's arms)" , "Include - clasp" , "Take in arms" .)