Part of aircraft that is in transportation, apparently (13)
I believe the answer is:
undercarriage
'part' is the definition.
(I have seen 'part of plane' mean 'undercarriage' so perhaps 'part' could also mean 'undercarriage')
'aircraft that is in transportation apparently' is the wordplay.
I cannot quite understand how this works, but
'transportation' could be 'carriage' (I've seen this before) and 'carriage' is found within the answer.
The remaining letters 'under' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for undercarriage that I've seen before include "part of the aircraft" , "Aircraft's landing gear" , "Aircraft support" , "(Aircraft) landing gear" , "part of plane" .)