Englishman in Australia welcomes English literary work (4)
I believe the answer is:
poem
'literary work' is the definition.
(poem is a kind of literary work)
'englishman in australia welcomes english' is the wordplay.
'englishman in australia' becomes 'pom' (I've seen this before).
'welcomes' indicates putting letters inside (in sense of 'invites in').
'english' becomes 'e' (abbreviation).
'pom' enclosing 'e' is 'POEM'.
(Other definitions for poem that I've seen before include "Rhyme" , "Literary composition, sometimes in verse" , "Eg, If-" , "Piece of verse" , "Verse form" .)