Soft inland turtle (8)
I believe the answer is:
terrapin
'turtle' is the definition.
(terrapin is a kind of turtle)
'soft inland' is the wordplay.
I cannot quite understand how this works, but
'soft' could be 'p' (musical abbreviation for 'piano') and 'p' is found within the answer.
The remaining letters 'terrain' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for terrapin that I've seen before include "Small freshwater turtle" , "Little turtle" , "freshwater creature" , "temporary building" , "Swimmer" .)