Bang, as a toe (4)
I believe the answer is:
stub
'bang as a toe' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stub that I've seen before include "Tooth remnant" , "A short stump as of cigar" , "Strike (a toe, say) against something hard" , "Small piece, especially of something cut down or worn away" , "Truncated remnant" .)