Chuck seems a bit pushy (3)
I believe the answer is:
shy
'chuck' is the definition.
(thesaurus)
'seems a bit pushy' is the wordplay.
'a bit' says to take the initial letters (I've seen 'bit of' mean this).
'pushy' becomes 'hy' (I can't explain this - if you can you should believe this answer much more).
The first letter of 'seems' is 's'.
's'+'hy'='SHY'
Can you help me to learn more?
(Other definitions for shy that I've seen before include "Retiring; fling" , "cast" , "Timid and self-conscious" , "Bashful or timid" , "Quick throw" .)