Possible Clues:

• Fish caught at busy centre
• ___ rub (summer affliction)
• Trainee hangs round hospital? That's fishy
• Common baitfish in North American streams
• Carp cousin that sounds fat
• Fish young bear has found hard to eat
• Kin of a carp
• A type of fish - or the hairstyle sported in Repin's Reply Of The Zaporozhian Cossacks To Sultan Mehmed IV Of Turkey
• Lots go to the centre for aquatic creature
• Swimmer in sports institution preferring hotel to lake