Train overcrowded at the start: main line to occupy platform worker? (6)
I believe the answer is:
oilman
'platform worker?' is the definition.
'oilman' can be an answer for 'worker?' (oilman is a kind of worker). I'm unsure of the 'platform' bit.
'train overcrowded at the start main line to occupy' is the wordplay.
'train' is an anagram indicator (to train can mean to grow something into a shape).
'at the start' says to take the initial letters.
'line' becomes 'l'.
'to occupy' indicates putting letters inside.
The initial letter of 'overcrowded' is 'o'.
'o'+'main'='omain'
'omain' anagrammed gives 'oiman'.
'oiman' going around 'l' is 'OILMAN'.
Can you help me to learn more?
(Other definitions for oilman that I've seen before include "Person involved with crude" , "One working in the "black gold" industry" , "Owner of company that sinks wells for fuel" , "Worker" .)