Terribly old and sedate, mincing veal (8)
I believe the answer is:
primeval
'terribly old' is the definition.
'primeval' can be an answer for 'old' (thesaurus). I'm not sure about the 'terribly' bit.
'sedate mincing veal' is the wordplay.
I cannot quite understand how this works, but
'sedate' could be 'prim' (I've seen this in another clue) and 'prim' is present in the answer.
an anagram of 'veal' is 'eval' which is located in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'and' acts as a link.
Can you help me to learn more?
(Other definitions for primeval that I've seen before include "Belonging to the Earth's beginnings" , "Prehistoric" , "From the earliest times" , "Instinctive" , "Ancient" .)