Launch some motif, linguistically (5)
I believe the answer is:
fling
'launch' is the definition.
(thesaurus)
'some motif linguistically' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'FLING' is hidden in the letters of 'motif linguistically'.
(Other definitions for fling that I've seen before include "Throw as in Highland dance?" , "Throw - short affair" , "Highland dance - spell of way-out behaviour" , "Throw violently" , "Brief affair; throw" .)