Annoying to be discovered in Ormskirk in guesthouse (6)
I believe the answer is:
irking
'annoying' is the definition.
(I've seen this in another clue)
'discovered in ormskirk in guesthouse' is the wordplay.
'discovered' indicates a hidden word (remove the letters covering the answer in the clue).
'IRKING' is hidden within 'in ormskirk in guesthouse'.
'to be' acts as a link.
(Other definitions for irking that I've seen before include "Annoying, irritating" , "Annoying, bothering" , "Irritating, vexing" , "Disgusting" .)