Government dispute blocking blatant hospital extension beyond limits (10)

'extension beyond limits' is the definition.
I can't tell whether this defines the answer.

'government dispute blocking blatant hospital' is the wordplay.
'government' becomes 'g' (abbreviation for government).
'dispute' becomes 'row' (row is a kind of dispute).
'blocking' indicates putting letters inside (to block can mean to plug a gap in something).
'blatant' becomes 'overt' (I've seen this in another clue).
'hospital' becomes 'H' (abbreviation for hospital on maps).
'g'+'row'='grow'
'grow' going within 'overt' is 'overgrowt'.
'overgrowt'+'h'='OVERGROWTH'

Can you help me to learn more?