Belief of cardinal who wanted to phone home? (5)
I believe the answer is:
tenet
'belief' is the definition.
(synonyms)
'cardinal who wanted to phone home?' is the wordplay.
I cannot really see how this works, but
'cardinal' could be 'ten' (similar in meaning) and 'ten' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Other definitions for tenet that I've seen before include "Article of belief" , "you may believe in it" , "Conviction" , "A palindromic doctrine or creed" , "Key principle" .)