Found distressed after landing catch? That’s inconceivable (7,2)
I believe the answer is:
unheard of
'inconceivable' is the definition.
(thesaurus)
'found distressed after landing catch?' is the wordplay.
I cannot quite understand how this works, but
'catch?' could be 'hear' (to catch something is to hear it being spoken) and 'hear' is present in the answer.
an anagram of 'found' is 'undof' which is present in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for unheard of that I've seen before include "Very unusual" , "ignoring precedent" , "never seen before" .)