Related Clues:

• Come or go in
• Enroll, sign up
• Go or come in
• Official record of names etc.
• Official record of names etc
• Offical roll of names
• Official record of names
• Register, say as being unemployed
• Enlist, join up
• Register oneself as for employment assistance
• Register, for unemployment benefit perhaps
• File, record
• 'Register, for job-seeker's allowance, say (4,2)'
• Official list of names
• What the fish might do to get in like this under it for 18 down