Crossword puzzle clue "steel toughener"

Here are the possible solutions for steel toughener clue

Answer
Clue
Relevancy
titanium
Clue
Steel toughener
situp
Clue
Tummy toughener
abs
Clue
"___ of Steel" (1990s exercise video)
"___ of Steel" (classic exercise video)
___ of steel
"___ of Steel" (workout video)
"___ of Steel" (noted exercise video)
___ of Steel (video classic)
Definition
AB, an abdominal muscle

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