Female star shortened little jumper (4)
I believe the answer is:
flea
'female star shortened little jumper' is the definition.
'flea' can be an answer for 'jumper' (something that jumps). I'm not sure about the 'female star shortened little' bit.
'shortened little jumper' is the wordplay.
'shortened' means to remove the last letter.
'little jumper' becomes 'fleas' (fleas are known for jumping).
'fleas' with its last letter taken away is 'FLEA'.
Can you help me to learn more?
(Other definitions for flea that I've seen before include "one is proverbially fit" , "Bug" , "Small jumper in small circus" , "Tiny circus performer?" , "Little jumping insect" .)