Relatives around Peruvian city drink by old mountain (11)
I believe the answer is:
kilimanjaro
'mountain' is the definition.
(I've seen this before)
'relatives around peruvian city drink by old' is the wordplay.
'relatives' becomes 'kin' (kin can mean relatives or family).
'around' is an insertion indicator.
'peruvian city' becomes 'lima' (I've seen this in another clue).
'drink by' becomes 'jar' (colloquial. I am not sure about the 'by' bit.).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'kin' going around 'lima' is 'kiliman'.
'kiliman'+'jar'+'o'='KILIMANJARO'
Can you help me to learn more?
(Other definitions for kilimanjaro that I've seen before include "African mountain with snows" , "Africa's highest peak" , "Highest mountain in Africa" , "Africa's highest mountain" , "Extinct volcano in Tanzania" .)