With no guarantee of noticing singer’s back in race (8)

I believe the answer is:

missable

I'm a little stuck... Click here to teach me more about this clue!

'with no guarantee of noticing' is the definition.
I can't judge whether this definition defines the answer.

'singer's back in race' is the wordplay.
'singer' becomes 'bass' (bass is a kind of singer).
'back' is a reversal indicator.
'in' is an insertion indicator.
'race' becomes 'mile' (mile can refer to a mile-long race).
'bass' back-to-front is 'ssab'.
'ssab' placed within 'mile' is 'MISSABLE'.

Can you help me to learn more?

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.