Possible Clues:

• Clouseau and/or Morse?
• One should look thoroughly for trendy magazine wanting adult's clothing
• Design of prison must include European court examiner
• One scrutinises – Nice's port (anag)
• Police officer in precinct keeping quiet
• Garda at home gets good odds on reader losing head
• I look over trendy area outside Portuguese capital
• He'll check spirit at pub, so you say
• Case worker
• Policeman quietly infiltrating fashionable zone