In public, British Rail backed support for type of engine (9)
I believe the answer is:
turboprop
'type of engine' is the definition.
'turboprop' can be an answer for 'engine' (I've seen this before). I'm not sure about the 'type of' bit.
'in public british rail backed support' is the wordplay.
'in' indicates putting letters inside.
'public' becomes 'out' (out can mean released to the public).
'british rail' becomes 'br'.
'backed' is a reversal indicator.
'support' becomes 'prop' (prop up can mean to support).
'out' placed around 'br' is 'obrut'.
'obrut' backwards is 'turbo'.
'turbo'+'prop'='TURBOPROP'
'for' is the link.
Can you help me to learn more?
(Other definitions for turboprop that I've seen before include "Type of aircraft engine" , "Jet engine with the turbine coupled to a propeller" , "Pub torpor (anag) - type of aircraft" , "Type of aero engine" , "It may still take off" .)