Pioneer's dog went round lake (7)
I believe the answer is:
settler
'pioneer's' is the definition.
(I've seen this before)
'dog went round lake' is the wordplay.
I cannot really see how this works, but
'lake' could be 'l' and 'l' is found in the answer.
'dog' could be 'setter' (setter is a kind of dog) and 'setter' is found within the remaining letters.
This accounts for all the letters.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for settler that I've seen before include "decisive blow" , "Person who moves into an uninhabited country" , "Colonist, pioneer" , "Coloniser - arbitrator" , "Early colonist" .)