Bit of a calamity friends commonly share (5)
I believe the answer is:
amity
'commonly share' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'bit of a calamity friends' is the wordplay.
'bit of' says the answer is hidden in the clue.
'AMITY' is hidden in the letters of 'calamity friends'.
Can you help me to learn more?
(Other definitions for amity that I've seen before include "Fellowship" , "Friendly feeling, fraternity" , "Friendliness" , "Accord" , "understanding" .)