Recalling marines on strike, one could sound the reveille (5,5)
I believe the answer is:
alarm clock
'one could sound the reveille' is the definition.
I can't tell whether this defines the answer.
'recalling marines on strike' is the wordplay.
'recalling' becomes 'a la' ('a la' something means in a way reminiscent of it).
'marines' becomes 'RM' (abbreviation for 'Royal Marines').
'on' means one lot of letters go next to another (in a down clue, letters appear on others).
'strike' becomes 'clock' (clock can informally mean to hit someone).
'ala'+'rm'+'clock'='ALARM-CLOCK'
Can you help me to learn more?
(Other definitions for alarm clock that I've seen before include "Morning rouser" , "Wake-up timepiece" , "TimeWarner" .)