Relatively friendly with some leading lyrist working around Spain (8)

I believe the answer is:

sisterly

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'relatively friendly' is the definition.
'sisterly' can be an answer for 'friendly' (thesaurus). I'm unsure of the 'relatively' bit.

'some leading lyrist working around spain' is the wordplay.
'leading' indicates taking the first letters.
'working' is an anagram indicator.
'around' means one lot of letters goes inside another.
'spain' becomes 'e' (abbreviation for Espana**).
The initial letter of 'some' is 's'.
'lyrist' with letters rearranged gives 'istrly'.
'istrly' placed around 'e' is 'isterly'.
's'+'isterly'='SISTERLY'

'with' acts as a link.

Can you help me to learn more?

(Other definitions for sisterly that I've seen before include "relatively close" , "I try less (anag.)" , "To do with one's female sibling" , "Like a female relative" , "Friendly in a female way" .)

I've seen this clue in the Irish Times.

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