### Clue: All the rage to possess my book about bagpipe music (7)
### Answer: PIBROCH 
 ### Explanation: Definition: bagpipe music
 **Reversal of**(… about) { HIP(all the rage;fashionable;up to date with the latest) **containing**(to possess) [ COR(my!;exclamation of surprise) + B(abbrev. for "book") ] }.