Friend and mother welcomed by girl in Spanish city (3,6)
I believe the answer is:
las palmas
'spanish city' is the definition.
The definition suggests a singular noun which matches the answer.
'friend and mother welcomed by girl in' is the wordplay.
'friend' becomes 'pal' (pal can mean a friend).
'and' means one lot of letters go next to another.
'mother' becomes 'ma' (Ma is another word for mother or mum).
'welcomed by' means one lot of letters goes inside another (letters welcomed inside).
'girl in' becomes 'lass' (I can't justify this - if you can you should give a lot more credence to this answer).
'pal'+'ma'='palma'
'palma' going into 'lass' is 'LAS PALMAS'.
Can you help me to learn more?
(Other definitions for las palmas that I've seen before include "City in the Canary Islands" , "In resort" , "port" , "Gran Canaria's capital" , "somewhere in the Canaries" .)