Steep dune built behind end of lane (5)
I believe the answer is:
endue
'steep' is the definition.
Although both the answer and definition are verbs in their base form, I cannot understand how one could define the other.
'dune built behind end of lane' is the wordplay.
'built' is an anagram indicator.
'behind' says to put letters next to each other.
'end of' suggests the final letters.
The final letter of 'lane' is 'e'.
'dune' with letters rearranged gives 'endu'.
'endu'+'e'='ENDUE'
Can you help me to learn more?
(Other definitions for endue that I've seen before include "Invest (something) with a quality or ability" , "Invest - provide" , "Endow or crown with" , "Clothe" , "Put on clothes" .)