Be disloyal to the woman, if only fairly (6)
I believe the answer is:
rather
'fairly' is the definition.
(I've seen this before)
'be disloyal to the woman if only' is the wordplay.
I cannot really see how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'woman' could be 'her' (her refers to a woman) and 'her' is located in the answer.
The remaining letters 'ra' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for rather that I've seen before include "Most certainly" , "Preferably, instead" , "To a limited degree" , "Somewhat; more willingly" , "On the contrary; sooner" .)