Diffident (3)
'diffident' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for bashful that I've seen before include "Neither Happy, Sneezy, Dopey, Grumpy, Sleepy nor Doc!" , "Shy, timid" , "Shy and self-conscious" , "Sleepy companion" , "reserved" .)
'diffident' is the definition.
(I know that diffident can be written as shy)
This is all the clue.
(Other definitions for shy that I've seen before include "'Lacking self-confidence, timid (3)'" , "Short of" , "Chary" , "Timid; throw quickly" , "Quick throw" .)