Saucy type upsets bowler in taking second wicket (6)
I believe the answer is:
tahini
'saucy type' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'upsets bowler in taking second wicket' is the wordplay.
'upsets' says the letters should be written in reverse.
'bowler' becomes 'hat' (I've seen this in other clues).
'taking second wicket' becomes 'i' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'hat' reversed gives 'tah'.
'tah'+'in'+'i'='TAHINI'
Can you help me to learn more?
(Other definitions for tahini that I've seen before include "Sesame-seed based foodstuff" , "Sesame seed paste" , "Paste of sesame seeds" , "Sesame paste; in a hit (anag.)" .)