British Rail has something to do with this part of a plant (5)
I believe the answer is:
bract
'a plant' is the definition.
The answer is an example.
'british rail has something to do with this part' is the wordplay.
'british rail' becomes 'br'.
'has' means one lot of letters go next to another.
'something to do' becomes 'ac' (I am not sure about this - if you are sure you should believe this answer much more).
'with' means one lot of letters go next to another.
'part' says to take the initial letters.
The initial letter of 'this' is 't'.
'br'+'ac'+'t'='BRACT'
'of' is the link.
Can you help me to learn more?
(Other definitions for bract that I've seen before include "Small scale" , "Flower-bearing leaf" , "Leaf-like part of plant" , "Type of leaf" .)