Bob's short and oddly seedy (7)
I believe the answer is:
curtsey
'bob's' is the definition.
(I've seen this before)
'short and oddly seedy' is the wordplay.
'short' becomes 'curt' ('curt' can be a synonym of 'short'**).
'and' is a charade indicator (letters next to each other).
'oddly' means one should take alternating letters.
The alternate letters of 'seedy' are 'sey'.
'curt'+'sey'='CURTSEY'
(Other definitions for curtsey that I've seen before include "Formal greeting, bob" , "Gesture of respect" , "Girl's bob" , "Respectful greeting" , "old form of obeisance" .)