Throw short (3)
I believe the answer is:
shy
I believe this is a double definition.
'throw' is the first definition.
(I know that shy is a type of throw)
'short' is the second definition.
(I've seen this in other clues)
(Other definitions for shy that I've seen before include "Timid (around people)" , "'Timid, diffident (3)'" , "Reticent" , "Embarrassed in company" , "Tongue-tied" .)