For example, stupid flipping sucker! (5)
I believe the answer is:
midge
'sucker' is the definition.
(insect which sucks blood)
'for example stupid flipping' is the wordplay.
'for example' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'stupid' becomes 'dim' (similar in meaning).
'flipping' shows that the letters should be reversed in order.
'eg'+'dim'='egdim'
'egdim' written backwards gives 'MIDGE'.
(Other definitions for midge that I've seen before include "Small person" , "Tiny biting fly" , "Small swarming biting insect" , "Tiny swarming insect" , "Two-winged fly" .)