Inventory has last character as a composer (5)
I believe the answer is:
liszt
'a composer' is the definition.
(Franz Liszt)
'inventory has last character' is the wordplay.
'inventory' becomes 'list' (I've seen this in another clue).
'has' indicates putting letters inside.
'last character' becomes 'Z'.
'list' going around 'z' is 'LISZT'.
'as' acts as a link.
(Other definitions for liszt that I've seen before include "with his partner, drunk?" , "Franz ---, Hung. composer" , "Composer of the Hungarian Rhapsodies" , "Franz . . . . ., 19th century Hungarian composer and pianist" , "classical composer" .)