5a Fear, being tone-deaf etc, some instruments or others (6)
10a A point going in one (non-English) ear's garbled inadvertently (8)
13,8 Entering and leaving canals? Not 12 or 24 (2,,3,3,3,3,3,5) could be 'in and out ...??'
18a Uses what's between ears, has fun with left to right shift (10)
Merci d'avance!