Possible Clues:

• Suffer, experience
• Suffer ruin providing security for work unit
• Experience - bear
• Don't leave enough or you'll suffer for it (7)
• Experience diminished energy
• Don't leave too little or you'll suffer for it (7)
• Experience or live through
• Don't leave enough - you'll only suffer for it
• If perhaps, you don't leave enough, you'll suffer for it
• Open to accept measure of work experience