Trouble, taking resistance to be relative (7)
I believe the answer is:
brother
This might be a double definition.
'trouble taking resistance' is the first definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'be relative' is the second definition.
(I've seen this before)
'to' is the link.
Can you help me to learn more?
(Other definitions for brother that I've seen before include "Relation" , "Close relative" , "Fellow-member" , "Trade unionist" , "Male sibling" .)