Crossword Genius

A purposeful glance at the dictionary? (7,4)

Ross

I believe the answer is:

meaning look

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

'dictionary?' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'a purposeful glance at' is the wordplay.
I cannot really understand how this works, but
'a' could be 'an' and 'an' is present in the answer.
'glance' could be 'look' (I've seen this in another clue) and 'look' is present in the answer.
'at' could be 'in' and 'in' is present in the answer.
The remaining letters 'meg' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'the' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Independent.
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