Road surface dangerous with learner on it (6)
I believe the answer is:
gravel
'road' is the definition.
(thesaurus)
'surface dangerous with learner on it' is the wordplay.
I cannot quite understand how this works, but
'dangerous' could be 'grave' (synonyms) and 'grave' is found within the answer.
'learner' could be 'l' (as in a learner driver with L-plates on their car) and 'l' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for gravel that I've seen before include "Coarse sand with small stones used for roads, driveways etc" , "Rocky fragments" , "Small fragments of rock" , "Driveway surface" , "Grit" .)