Show pleasure, coming across international figure of speech (6)
I believe the answer is:
simile
'figure of speech' is the definition.
(simile is a kind of figure of speech)
'show pleasure coming across international' is the wordplay.
'show pleasure' becomes 'smile' (I've seen this before).
'coming across' is an insertion indicator.
'international' becomes 'i' (abbreviation eg in IMF).
'smile' going around 'i' is 'SIMILE'.
(Other definitions for simile that I've seen before include "Figure of speech that expresses a resemblance between different things" , "as easy as pie, perhaps" , "Figure of speech comparing one thing to another" , "Figure of speech, eg, as cool as a cucumber" , "as daft as a brush, say" .)