Related Clues:

• Spins Def Leppard EP, as it's rather profound
• Like bass voices
• Pitched low
• Like the diving-board end of the pool
• Word with freeze or fry
• Welsh water pressure's down a long way
• Like a fat cat's pockets
• Developer misses lover - how profound is that?
• Type of thinker or sleeper
• Sea, with 'the'
• Bass in range
• Like the ten-foot part of the swimming pool
• Very far down
• Like the far end of the pool
• Opposite of "shallow"