Search far end of Yorkshire dale (5)
I believe the answer is:
combe
'dale' is the definition.
(thesaurus)
'search far end of yorkshire' is the wordplay.
'search' becomes 'comb' (combing is a kind of searching).
'far end of yorkshire' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'comb'+'e'='COMBE'
Can you help me to learn more?
(Other definitions for combe that I've seen before include "Hollow" , "deep depression" , "valley" .)