Could be insulin: find out more on going to the hospital (7)
I believe the answer is:
hormone
'could be insulin' is the definition.
I can't tell whether this definition defines the answer.
'out more on going to the hospital' is the wordplay.
'out' indicates an anagram.
'going to' is a charade indicator (letters next to each other).
'the hospital' becomes 'h' (abbreviation for hospital on maps).
'more'+'on'='moreon'
'moreon' anagrammed gives 'ormone'.
'ormone' after 'h' is 'HORMONE'.
'find' acts as a link.
Can you help me to learn more?
(Other definitions for hormone that I've seen before include "Stimulating bodily secretion" , "Growth secretion" , "therapy to replace this?" , "Bodily activity regulator" , "insulin perhaps" .)