With which to make a start in geology (6)
I believe the answer is:
strata
'with which to make a start in geology' is the definition.
I can't tell whether this definition defines the answer.
'with which to make a start' is the wordplay.
'with' is an insertion indicator.
'which' becomes 'a' (I can't justify this - if you can you should believe this answer much more).
'to make' indicates anagramming the letters.
'start' with letters rearranged gives 'strta'.
'a' inserted inside 'strta' is 'STRATA'.
Can you help me to learn more?
(Other definitions for strata that I've seen before include "Layers of rock on earth's surface" , "Layers or social classes" , "Beds of sedimentary rock" , "Levels, grades or social classes" , "Layers as of rock in the earth's crust" .)
