Ship brings nothing back to Tudor ruler (5)
I believe the answer is:
liner
'ship' is the definition.
(as in an ocean liner)
'nothing back to tudor ruler' is the wordplay.
'nothing' becomes 'nil' (eg nil is zero in football).
'back' says the letters should be written in reverse.
'to' is a charade indicator (letters next to each other).
'tudor ruler' becomes 'er' (abbreviation for Elizabeth Regina. I am not sure about the 'tudor' bit.).
'nil' reversed gives 'lin'.
'lin'+'er'='LINER'
'brings' acts as a link.
Can you help me to learn more?
(Other definitions for liner that I've seen before include "Cosmetic; fine paintbrush" , "Pleasure cruiser" , "Cruise ship" , "Large passenger or cargo ship travelling on regular route" , "Passenger transport" .)