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' says to put letters next to each other.
'something to do' becomes 'ac' (I am not sure about this - if you are sure you should believe this answer much more).
'with' says to put letters next to each other.
'part' suggests taking the first 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" .)