Board behind reversing vehicle that can be easily dealt with (9)
I believe the answer is:
tractable
'that can be easily dealt with' is the definition.
(intractable means difficult to deal with)
'board behind reversing vehicle' is the wordplay.
'board' becomes 'table' (synonyms).
'behind' says to put letters next to each other.
'reversing' says the letters should be written backwards.
'vehicle' becomes 'cart' (cart is a kind of vehicle).
'cart' in reverse letter order is 'trac'.
'table' after 'trac' is 'TRACTABLE'.
(Other definitions for tractable that I've seen before include "Docile" , "Easy to manage or deal with" , "easily handled" , "easily managed" , "Easily controlled" .)