French seen with old Mike, sometime Tube traveller? (4)
I believe the answer is:
ovum
'tube traveller?' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for ovum that I've seen before include "A female egg-cell" , "Human egg cell" , "Reproductive cell, 'egg' in Latin" , "Female gamete" , "bit of life potentially" .)