seven days

[hoggyboy]

6 down flexible and strong ?i??
13 across creation of select groups o?i???n
17 across keen on riding ?i?s??
21 across walk awkwardly s?a?b?l
60 across crude p?o?a?e

[EGTB]

60 Profane

[boxtops]

13 - opinion (if creation means something the groups create, rather than the creation of the groups themselves - not clear!)

[boxtops]

21 - stumble (but that means 2 of your letters are wrong)

[boxtops]

17 - Horsey (if your I is wrong)

[sandyRoe]

6d Wiry?

[Oldred]

21a shamble ?

[bobmaim]

If stumble is correct,what is 2 down?

[poortony]

Sierra Maestra, Cuban mountains

[poortony]

13a elitisn (given before but it knocks my entitle out for 4d