Muscles contributing to physical fitness (4)
I believe the answer is:
calf
'muscles contributing to physical fitness' is the definition.
I can't judge whether this defines the answer.
'contributing to physical fitness' is the wordplay.
'contributing to' indicates the answer is hidden within the clue (the answer contributes to part of the clue ).
'CALF' is hidden within 'physical fitness'.
Can you help me to learn more?
(Other definitions for calf that I've seen before include "Young moo-er" , "Is it above the ankle" , "Young animal associated with soft leather" , "Young bovine animal" , "stocking filler" .)