Pod exposed after nosing under topsoil initially (6)
I believe the answer is:
peanut
'pod' is the definition.
(peanut is a kind of pod)
'exposed after nosing under topsoil initially' is the wordplay.
'exposed' becomes 'pean' (I can't explain this - if you can you should believe this answer much more).
'after' means one lot of letters go next to another.
'nosing' suggests taking the first letters (I've seen 'nose of' mean this).
'initially' suggests taking the first letters.
The initial letter of 'under' is 'u'.
The initial letter of 'topsoil' is 't'.
'pean'+'u'+'t'='PEANUT'
Can you help me to learn more?
(Other definitions for peanut that I've seen before include "Item of fruit" , "Eat pun for the hard fruit" , "Monkey nut" , "Leguminous seed eaten as snack or butter" , "Singularly little money" .)