Drove back from Holland (4)
I believe the answer is:
edam
'holland' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'drove back from' is the wordplay.
'back' indicates one should take the final letters (the letter at the back).
'from' becomes 'dam' (I can't explain this - if you can you should give a lot more credence to this answer).
The last letter of 'drove' is 'e'.
'e'+'dam'='EDAM'
Can you help me to learn more?
(Other definitions for edam that I've seen before include "town in Holland" , "Type of cheese" , "Made into a nice cheese" , "Yellow cheese with a red covering" , "Dutch 8 across" .)