Rat: he gets confused in fox hole (5)
I believe the answer is:
earth
'fox hole' is the definition.
'earth' can be an answer for 'hole' (I've seen this before). I'm not sure about the 'fox' bit.
'rat he gets confused' is the wordplay.
'gets confused' indicates an anagram (I've seen 'get confused' mean this (I've seen this in other clues)).
'rat'+'he'='rathe'
'rathe' anagrammed gives 'EARTH'.
'in' is the link.
Can you help me to learn more?
(Other definitions for earth that I've seen before include "cost of which is very high" , "costs so much?" , "Meek's inheritance" , "brownish pigment?" , "Make electrics safe" .)