Rodents ’orrible woman has in the open on island (7)
I believe the answer is:
agoutis
'rodents' is the definition.
(I've seen this before)
'has in the open on island' is the wordplay.
'has in' becomes 'ag' (I can't explain this - if you can you should believe this answer much more).
'the open' becomes 'out' (I've seen this in other clues).
'on' is a charade indicator (letters next to each other).
'island' becomes 'is'.
'ag'+'out'+'is'='AGOUTIS'
''orrible woman' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for agoutis that I've seen before include "Rodents" , "More than one animal" .)