Back boiler put in new position (9)
I believe the answer is:
rearrange
'position' is the definition.
Although both the answer and definition are verbs in their base form, I can't understand how one could define the other.
'back boiler put in new' is the wordplay.
'back' becomes 'rear' (something's rear is its back).
'boiler' becomes 'rage' (I can't explain this - if you can you should believe this answer much more).
'put in' is an insertion indicator (instruction to solver).
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'rage' going around 'n' is 'range'.
'rear'+'range'='REARRANGE'
Can you help me to learn more?
(Other definitions for rearrange that I've seen before include "Order differently" , "Sort" , "Give another order" , "Again work out" , "Alter" .)