Stop little woman getting musical instrument (5)
I believe the answer is:
banjo
'musical instrument' is the definition.
(banjo is a kind of musical instrument)
'stop little woman getting' is the wordplay.
'stop' becomes 'ban' (I've seen this in other clues).
'little woman' becomes 'Jo' (character from Little Women).
'getting' means one lot of letters go next to another.
'ban'+'jo'='BANJO'
(Other definitions for banjo that I've seen before include "strumming instrument" , "Softly (music)" , "Stringed instrument with circular body" , "Stringed instrument of the guitar family" , "Stringed instrument beloved of old minstrel shows" .)