One requiring pluck (bravo!), like a dog in space (9)
I believe the answer is:
balalaika
'one requiring pluck' is the definition.
(instrument which is plucked)
'bravo like a dog in space' is the wordplay.
'bravo' becomes 'b' (phonetic alphabet: alpha, bravo, charlie etc.).
'like' becomes 'a la' ('a la' can mean 'in the way of' in French).
'a dog in space' becomes 'Laika' (first dog in space in 1957).
'b'+'ala'+'laika'='BALALAIKA'
(Other definitions for balalaika that I've seen before include "Russian "guitar"" , "Russian triangular musical instrument" , "Instrument with three strings and a triangular body" , "Russian guitar-like instrument" , "Stringed instrument used for Russian folk music" .)