Introduction to "Happy New Year" composed in unspecified place (8)
I believe the answer is:
anywhere
'unspecified place' is the definition.
(I've seen this before)
'introduction to happy new year composed' is the wordplay.
'introduction to' indicates taking the first letters (I've seen 'introductions to' mean this).
'composed' indicates anagramming the letters.
The first letter of 'happy' is 'h'.
'h'+'new'+'year'='hnewyear'
'hnewyear' anagrammed gives 'ANYWHERE'.
'in' acts as a link.
(Other definitions for anywhere that I've seen before include "To some degree" , "In whichever place" , "In whatever place" , "In an unspecified location" , "no special venue" .)