Earth thrown up from crumbling hole in works (8)
I believe the answer is:
molehill
'earth thrown up' is the definition.
I can't judge whether this definition defines the answer.
'crumbling hole in works' is the wordplay.
'crumbling' is an anagram indicator.
'in' means one lot of letters goes inside another.
'works' becomes 'mill' (mill is a kind of works).
'hole' is an anagram of 'oleh'.
'oleh' inserted inside 'mill' is 'MOLEHILL'.
'from' is the link.
Can you help me to learn more?
(Other definitions for molehill that I've seen before include "Mound of earth in garden" , "Result of minor excavation" , "small rise" , "? It's what the Italian found in Flanders" , "Tiny mountain on the lawn?" .)