Being stubborn, I ring tenants anyhow (12)
I believe the answer is:
intransigent
'being stubborn' is the definition.
(I've seen this before)
'i ring tenants anyhow' is the wordplay.
'anyhow' indicates anagramming the letters.
'ring'+'tenants'='ringtenants'
'ringtenants' is an anagram of 'ntransigent'.
'i'+'ntransigent'='INTRANSIGENT'
(Other definitions for intransigent that I've seen before include "Not prepared to adapt or compromise" , "staying put" , "Hardliner" , "Not flexible" , "Diehard" .)