Remind coalition about covering all the angles (15)

I believe the answer is:

omnidirectional

'covering all the angles' is the definition.

'remind coalition about' is the wordplay.
'about' is an anagram indicator.
'remind'+'coalition'='remindcoalition'
'remindcoalition' anagrammed gives 'OMNIDIRECTIONAL'.

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app