Tail of calling bird, firmly fixed in the mind? (6)

I believe the answer is:

graven

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'firmly fixed in the mind?' is the definition.
I can't judge whether this definition defines the answer.

'tail of calling bird' is the wordplay.
'tail of' suggests the final letters.
'bird' becomes 'raven' (raven is a kind of bird).
The final letter of 'calling' is 'g'.
'g'+'raven'='GRAVEN'

Can you help me to learn more?

(Other definitions for graven that I've seen before include "Carved (as an image)" , "Carved, as images may be" , "Fixed indelibly (in mind)" .)

I've seen this clue in The Times.

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