### Clue: He composed line put in exam papers for sending back (7)
### Answer: VIVALDI 
 ### Explanation: Definition: He composed
 [ L(abbrev. for "line") **contained in**(put in) VIVA(short for "viva voce"/an oral exam) ] + **reversal of**(… for sending back) ID(abbrev. for "identity papers").
Answer: Antonio, Italian Baroque composer.