Crossword Genius

Cooking up eats with a grannie in her eighth decade? (14)

Ross

I believe the answer is:

septuagenarian

'in her eighth decade?' is the definition.

'cooking up eats with a grannie' is the wordplay.
'cooking' is an anagram indicator.
'with' means one lot of letters go next to another.
'up'+'eats'+'a'+'grannie'='upeatsagrannie'
'upeatsagrannie' with letters rearranged gives 'SEPTUAGENARIAN'.

(Other definitions for septuagenarian that I've seen before include "OAP" , "pensioner" , "Elderly person" , "One aged 70 to 79" .)

I've seen this clue in The Times.
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