Coolness shown during pressure cooking of some pork and lamb (6)
I believe the answer is:
aplomb
'coolness' is the definition.
(I've seen this before)
'cooking of some pork and lamb' is the wordplay.
'cooking' is an anagram indicator (cook can mean to falsify or distort).
'of' becomes 'o'.
'some' indicates taking the first letters.
'and' is a charade indicator (letters next to each other) (I've seen this in other clues).
The initial letter of 'pork' is 'p'.
'o'+'p'='op'
'op' after 'lamb' is 'lambop'.
'lambop' anagrammed gives 'APLOMB'.
'shown during pressure' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for aplomb that I've seen before include "'Poise, sang-froid (6)'" , "Self-satisfied dignity and confidence" , "Self confidence" , "Dignified self-confidence" , "coolness is required" .)