Possibly a tattooist in last place (4,6)

I believe the answer is:

back marker

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

'possibly a tattooist in last' is the definition.
I can't tell whether this defines the answer.

'place' is the wordplay.
I cannot quite understand how this works, but
'place' could be 'back' (back is a kind of place) and 'back' is present in the answer.
The remaining letters 'marker' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Irish Independent.

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