Foolish fruit-picker working between Poles and German provides service (8)
I believe the answer is:
evensong
'service' is the definition.
(type of church service)
'foolish fruit-picker working between poles and german' is the wordplay.
I cannot quite see how this works, but
'working' could be 'on' (e.g. a machine is working or on) and 'on' is located in the answer.
'poles' could be 'ns' (North and South poles) and 'ns' is found within the answer.
'german' could be 'g' (abbreviation) and 'g' is located in the answer.
'fruit picker' could be 'eve' (Eve picked the forbidden fruit) and 'eve' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'provides' acts as a link.
Can you help me to learn more?
(Other definitions for evensong that I've seen before include "... Prayers" , "Church service late in the day" , "6 [SERVICE] ?" , "Religious service" , "Service of evening prayer in Church of England" .)