Has to hurt trapping old walrus? (9)
I believe the answer is:
moustache
'walrus?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'has to hurt trapping old' is the wordplay.
'has to' becomes 'must' (I've seen this before).
'hurt' becomes 'ache' (synonyms).
'trapping' is an insertion indicator.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'must'+'ache'='mustache'
'mustache' enclosing 'o' is 'MOUSTACHE'.
Can you help me to learn more?
(Other definitions for moustache that I've seen before include "Walrus, e.g." , "something hairy" , "that's hairy" , "Facial hair touches Ma" , "Facial hair growth" .)