Being unqualified she shows some hesitation (5)
I believe the answer is:
sheer
'being unqualified' is the definition.
(I've seen this before)
'some hesitation' is the wordplay.
'some' becomes 'she' (I can't explain this - if you can you should give a lot more credence to this answer).
'hesitation' becomes 'er'.
'she'+'er'='SHEER'
'she shows' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for sheer that I've seen before include "Almost perpendicular or very thin" , "Unqualified" , "Precipitous or fine" , "Mere" , "Very steep or diaphanous" .)