No great distance for a cart to reverse (4)
I believe the answer is:
yard
'no great distance' is the definition.
'yard' can be an answer for 'distance' (I've seen this before). I'm not sure about the 'no great' bit.
'cart to reverse' is the wordplay.
'cart' becomes 'dray' (a cart without sides for delivering heavy loads).
'to reverse' says the letters should be written backwards.
'dray' reversed gives 'YARD'.
'for a' is the link.
Can you help me to learn more?
(Other definitions for yard that I've seen before include "Sail support" , "Three feet; enclosure" , "3 feet" , "Three feet - enclosed area" , "3ft" .)