### Clue: Expression of annoyance from bishop when in late regularly (5)
### Answer: BLAST 
 ### Explanation: Definition: Expression of annoyance
 B(abbrev. for "bishop", in chess notation) + [ AS(when, as in "as you pass him, look right") **contained in**(in) **the 1st and 3rd letters of**(… regularly) "late" ].