Yet my Mrs may be fearful of Tyger's appearance (8)

I believe the answer is:

symmetry

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'fearful of tyger's appearance' is the definition.
I can't tell whether this definition defines the answer.

'yet my mrs may be' is the wordplay.
'may be' is an anagram indicator.
'yet'+'my'+'mrs'='yetmymrs'
'yetmymrs' with letters rearranged gives 'SYMMETRY'.

Can you help me to learn more?

(Other definitions for symmetry that I've seen before include "Mirrored disposition about axis" , "Arrangement of parts in pleasing proportions" , "Balance between two parts" , "Proportion; beauty of form" , "Exact correspondence between parts" .)

I've seen this clue in The Guardian.

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