Bottom of skirt reaching far up top of leg (5)
I believe the answer is:
thigh
'top of leg' is the definition.
'thigh' can be an answer for 'leg' (I have seen 'Upper leg' mean 'thigh' so perhaps 'leg' could also mean 'thigh'). I'm not sure about the 'top of' bit.
'bottom of skirt reaching far up' is the wordplay.
'bottom of' says to take the final letters.
'reaching' is a charade indicator (letters next to each other).
'far up' becomes 'high' (I've seen this before).
The last letter of 'skirt' is 't'.
't'+'high'='THIGH'
Can you help me to learn more?
(Other definitions for thigh that I've seen before include "Femoral leg part" , "This bone is the femur" , "part of body" , "Joint of meat" , "Upper part of the leg" .)