| NEUROTRANSMITTER | Chemical substance released from the end of a nerve fibre |
| NODEOFRANVIER | Gap in the myelin sheath of a nerve fibre, named after the French physician (4,2,7) |
| SENSORY | Receptive; of a nerve fibre or impulse moving to the central nervous system (7) |
| RAMUS | Latin word for "branch", thus for a branching of a nerve; a barb of a feather; a process/arm of a bone such as the mandible or pubis; or, a twig (5) |
| ENDING | A termination or completion by way of a conclusion of a book, denouement of a play, extremity of a nerve or final part/syllable of a word (6) |
| IRONCURTAIN | Physical and ideological barrier between the Soviet Bloc and Western Europe from the end of WWII until the 1991 end of the Cold War (4,7) |
| GANGLIA | Swellings on a nerve fibre - gala gin (anag) (7) |
| IMPULSE | Electrical signal transmitted along a nerve fibre (7) |
| NUCLEAR | Form of energy released from the core of atoms (7) |
| LEUCOTOMY | Surgical operation that involves cutting some of the nerve fibres in the frontal lobes of the brain |
| AXON | Long nerve fibre that transmits impulses away from the nerve cell (4) |
| ENTER | What's the key to getting from the end of a line to the start? |
| EARLYMODERN | Designating the period of European history from the end of the Middle Ages to around 1750 (5,6) |
| AEROSOL | Container of pressurised substance released as a fine spray (7) |
| HOLOCENE | Geological epoch running from the end of the Pleistocene to the present day (8) |
| KITE | Bird of prey, or aerial craft flown from the end of a tether |
| MODERNHISTORY | Study of past events from the end of the Middle Ages onwards (6,7) |
| LANE | Life in the Fast ___ song co-written by Joe Walsh which was the third single released from the same album as 15a |
| TRUMP | A little gas released from the rear? ... |
| ENSHEATHE | Cover, as a nerve fiber |
