Unwanted acquisition, wrong iPod chosen by girl (8,7)
I believe the answer is:
poisoned chalice
'unwanted acquisition' is the definition.
The definition suggests a singular noun which matches the answer.
'wrong ipod chosen by girl' is the wordplay.
'wrong' indicates anagramming the letters.
'by' says to put letters next to each other.
'girl' becomes 'alice' (girl's nae).
'ipod'+'chosen'='ipodchosen'
'ipodchosen' with letters rearranged gives 'poisonedch'.
'poisonedch'+'alice'='POISONED CHALICE'
Can you help me to learn more?
(Other definitions for poisoned chalice that I've seen before include "This could have unfortunate consequences" , "evil in disguise" , "that was the death of Gertrude" , "may be a curse in disguise" , "This is likely to cause trouble" .)