It's not clear to first lady holding up travel permit (7)
I believe the answer is:
evasive
'it's not clear' is the definition.
I can't tell whether this defines the answer.
'first lady holding up travel permit' is the wordplay.
'first lady' becomes 'eve' (first woman in the Bible).
'holding' means one lot of letters goes inside another.
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'travel permit' becomes 'visa' (I've seen this in another clue).
'visa' back-to-front is 'asiv'.
'eve' enclosing 'asiv' is 'EVASIVE'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for evasive that I've seen before include "Devious" , "Shifty, slippery" , "Hard to catch" , "Trying to avoid commitment" , "Avoiding answering" .)