Engineers get bike to convert into something (7)
I believe the answer is:
recycle
'convert into something' is the definition.
I can't judge whether this defines the answer.
'engineers get bike' is the wordplay.
'engineers' becomes 're' (Royal Engineers).
'get' is a charade indicator (letters next to each other).
'bike' becomes 'cycle' (synonyms).
're'+'cycle'='RECYCLE'
'to' is the link.
Can you help me to learn more?
(Other definitions for recycle that I've seen before include "Process something so it can be used again" , "Behave greenly" , "salvage for further use" , "Process for further use" , "save resources" .)